Web App XSS Penetration Test

@srmukul2

Hi, I can perform a focused penetration test of your React-based application with emphasis on XSS, CSP bypasses, authenticated and unauthenticated attack paths, mobile exposure, and relevant network weaknesses. I’m a Certified Ethical Hacker with 7+ years of hands-on experience in web, API, mobile, and network penetration testing. Through Pentest Testing Corp, I’ve worked on hundreds of security assessments and manually validated thousands of vulnerabilities across modern applications. For this engagement, I’ll: • Map the full attack surface and trust boundaries • Test reflected, stored, and DOM-based XSS • Review CSP effectiveness and attempt practical bypasses • Test authenticated and unauthenticated workflows • Validate mobile-facing/API attack paths where in scope • Review exposed network services and configuration weaknesses • Manually verify every confirmed issue using Burp Suite Pro, OWASP ZAP, browser tools, and custom scripts You’ll receive a clear report with PoC payloads, reproduction steps, impact, severity, and practical React-focused remediation guidance, plus a retest summary after fixes. I’m available for your November testing window. After reviewing the final scope, roles, mobile coverage, and network boundaries, I can confirm the fixed price and timeline. Your AUD 2,000 budget can be assessed against that final scope. Best regards, Md Shofiur Rahman CEO, Pentest Testing Corp

@qualityxenter

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@jayantkumar314

For React XSS testing, automated scanning alone isn’t enough—the important findings often come from manually tracing user-controlled input through rendering, stored data, DOM manipulation and CSP behaviour. I can perform a focused assessment covering reflected, stored and DOM-based XSS, manually verify findings with Burp Suite/ZAP, and deliver reproducible evidence, impact details and React-specific remediation guidance. I’ll also re-test the fixes and provide a clear final summary. I can complete the initial assessment in around 5 days, depending on the application size. Do you have multiple user roles or privileged/admin areas that should be included in scope?

@hirujiyu

Hi there, ✔️ I understand you need a focused manual XSS assessment of your React application rather than a generic automated scan. I can thoroughly test the staging environment, validate exploitable findings, and provide clear remediation guidance your developers can act on. I’ll Cover: ✦ Full React application attack-surface mapping ✦ Reflected, stored & DOM-based XSS testing ✦ Input/output encoding & sanitization checks ✦ CSP bypass and security-header testing ✦ Authentication/role-based attack-surface review ✦ Manual validation with Burp Suite, OWASP ZAP & custom scripts ✦ Reproduction steps, impact & remediation report ✦ Post-fix re-testing and verification ⭐ MY APPROACH: I’ll combine automated discovery with manual payload testing and source/sink analysis, focusing on real exploitable paths rather than simply reporting scanner alerts. ❓ Can you provide the staging URL, test accounts/roles, and any existing security documentation? ❓ Do you already have a defined scope for APIs/subdomains, or should the assessment focus strictly on the React application? I can provide an initial assessment within 3–5 business days, followed by a concise re-test after fixes are deployed. Ready to review the staging environment and begin the assessment. Thank you.

@arifnafees

Greetings! As a seasoned professional with over a decade of experience in system administration and cloud computing, I possess the necessary technical repertoire to execute your XSS penetration test with utmost accuracy and proficiency. Having worked extensively with React-based web applications as a part of my toolkit, انا أؤمن بأهمية التحقق اليدوي على نحوٍ كبير for delivering actionable insights as opposed to generic scans. With certifications backed by industry-leading platforms such as AWS and Azure, you can rely on my ability to access your staging instance and perform comprehensive authenticated, unauthenticated, and mobile app tests. As a pen-tester, my main focus is always emulating real attackers - mapping every inch of your attack surface and providing concise impact assessments along with proof-of-concept payloads that pinpoint relevant vulnerabilities - like stepping into the shoes of an attacker; setting up Content-Security Policies that stand resiliently against potential bypasses. The endgame isn't just finding weaknesses; it's about efficient remediation. I will provide clear reproduction steps for each XSS finding and detailed advice that aligns with modern React best practices to facilitate developers in their mitigation process. Let's kickstart this collaboration post-November when your development and infrastructure updates are complete to ensure comprehensive testing without any disruption.

@offensiumvault

We at Offensium Vault Private Limited (ISO 27001:2022 & ISO 9001:2015) specialize in web application and mobile security testing and can perform a thorough assessment of your React-based application and associated network environment. Approach Full attack-surface mapping across authenticated and unauthenticated areas Manual testing for Reflected, Stored, DOM-based XSS, and filter/WAF/CSP bypasses Review of React-specific input handling, rendering, APIs, and client-side security controls Network security assessment covering exposed services, ports, configurations, and attack paths Authenticated, unauthenticated, and mobile application testing Testing aligned with OWASP Top 10, OWASP WSTG, and relevant mobile security practices Manual validation using Burp Suite, OWASP ZAP, Nmap, Nuclei, custom scripts, and other specialized tools Deliverables Detailed findings with reproducible PoC payloads and evidence Clear reproduction steps for developers Impact and severity assessment Practical remediation guidance aligned with modern React security practices Concise executive summary Short remediation retest report after fixes are implemented We focus on actionable, manually validated findings rather than generic automated scan results. We can align the engagement with your November testing window and begin with scope confirmation and a pre-engagement test plan.

@ukroficer

Hello, For a React staging app, the key is not a scanner run but tracing every place user data reaches the DOM, then proving reflected, stored, and CSP-bypass cases safely. I will use the supplied roles and docs to test like an attacker while keeping production untouched. - Full XSS attack-surface map across routes, forms, params, uploads, and rich text. - Verified PoCs with payloads, impact, screenshots, and exact reproduction steps. - React-focused fixes for escaping, sanitizing HTML, dangerous sinks, and CSP. - Re-test summary after fixes, with each item marked fixed or still exploitable. I use Burp Suite/ZAP plus manual payload variation, source-aware checks where access is available, and browser DevTools for sink tracing. Can you provide a test user for each role and confirm whether source code access is allowed for sink verification? I can start with an access checklist and testing rules of engagement. Roman

@Specgi

I am interested in conducting a comprehensive XSS penetration test for your web application to identify reflected, stored, and DOM-based cross-site scripting vulnerabilities. I will assess input fields, parameters, forms, APIs, authentication areas, and other relevant attack surfaces using a combination of manual testing and industry-standard security testing techniques. The assessment will focus on identifying vulnerabilities that could allow malicious scripts to execute in users’ browsers, compromise sessions, manipulate application content, or perform unauthorized actions. I will validate findings safely and responsibly, avoiding unnecessary impact to your application or data, while documenting the affected endpoints, payload behavior, security impact, and reproducible evidence. At the end of the engagement, you will receive a clear penetration-testing report containing confirmed vulnerabilities, severity levels, technical evidence, and practical remediation recommendations. My goal is to provide actionable results that help your development team eliminate XSS weaknesses and strengthen the overall security of the web application.

@ZohaibRoy

⭐⭐⭐⭐⭐ Expert Penetration Testing for Your React Web Application ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project needs and see you're looking for an experienced penetration tester for your React app. Look no further; Zohaib is here to help you! My team has completed over 50 similar projects in penetration testing. I will thoroughly test your application for Cross-Site Scripting (XSS) vulnerabilities and network weaknesses, ensuring a detailed report with practical remediation advice. ➡️ Why Me? I can easily handle your penetration testing project as I have 5 years of experience in web application security, focusing on XSS vulnerabilities, network assessments, and security policy evaluations. My expertise includes using tools like Burp Suite and OWASP ZAP, ensuring I deliver actionable insights rather than generic scans. ➡️ Let's have a quick chat to discuss your project in detail. I can share samples of my previous work and show you how I can add value. Looking forward to discussing this with you! ➡️ Skills & Experience: ✅ Penetration Testing ✅ Cross-Site Scripting (XSS) ✅ Network Security ✅ Security Assessments ✅ Burp Suite ✅ OWASP ZAP ✅ Vulnerability Mapping ✅ Manual Verification ✅ Reporting and Documentation ✅ Remediation Strategies ✅ Web Application Security ✅ Mobile App Testing Waiting for your response! Best Regards, Zohaib

@SajidaSaqira

Hello, You've mentioned the need for an experienced penetration tester to focus exclusively on your React-based web application to uncover Cross-Site Scripting (XSS) weaknesses. With over 5 years of experience in cybersecurity and a recent project involving XSS testing for a similar web app, I believe I am well-equipped for this task. For your project, my approach would involve mapping the full attack surface, testing both reflected and stored XSS, and verifying any bypasses of current content-security policies. I would provide a detailed report with proof-of-concept payloads, impact assessments, clear reproduction steps, and practical remediation advice aligned with modern React best practices. To get a better sense of my skills, please visit my portfolio: https://www.freelancer.com/u/SajidaSaqira/SS-Technologies I would appreciate a short call to discuss your project requirements in more detail. Best regards, Sajida Saqira

@mobasherreza10

Hi there, As a multi-skilled agency, we have a dedicated team well-versed in web application security and emulating real-world attack scenarios. We've successfully completed numerous penetration testing projects on different platforms and languages. Our comprehensive understanding of React would be invaluable as we identify every possible Cross-Site Scripting (XSS) weakness and network vulnerability within your application. In terms of testing tools, we possess an arsenal that encompasses Burp Suite, OWASP ZAP, as well as custom scripts capable of manual verification to ensure no stone goes unturned. Deliverables from us extend beyond mere scans; you can expect a concise yet exhaustive report outlining each XSS finding, including proof-of-concept payloads and their impact assessments. Best regards, Mobasher Reza

@naminghn

Hi there, I can directly address your need for a thorough XSS penetration test on your React-based web application. I'm experienced in utilizing tools such as Burp Suite and OWASP ZAP for reliable manual testing, ensuring that we uncover every possible cross-site scripting vulnerability. I'll provide detailed documentation, including step-by-step descriptions of each finding and actionable remediation advice aligned with React best practices. I can initiate the process quickly once I have access to the staging instance and any necessary documentation. I aim to deliver a well-structured report that includes proof-of-concept payloads and reproduction steps. Please let me know about any specific access prerequisites to get started efficiently. Regards, Ali

@FizzaNadeemK

Hi I can perform a focused manual XSS assessment of your React application across authenticated and unauthenticated attack surfaces including reflected stored DOM based XSS and CSP bypass scenarios I’ll combine Burp Suite OWASP ZAP and targeted manual testing then provide reproducible findings with safe proof of concepts impact details developer ready remediation and clear retest results I can start quickly once staging access credentials and available user roles are provided and can agree the testing scope and timeline before beginning

@rosscarter1011

Hi there, Uncovering hidden XSS vulnerabilities in a React application requires going beyond automated scanners to perform deep manual analysis of component rendering and state management, and failing to catch these bypasses could leave your users exposed to severe session hijacking. I specialize in targeted web application penetration testing with a strong focus on React security, leveraging manual verification and advanced tooling like Burp Suite to identify stored and reflected XSS and test Content Security Policy resilience. To ensure we hit the ground running, here are my questions: 1. Are there specific high-risk user roles or administrative workflows you want prioritized during the attack surface mapping? 2. Do you have a strict window for the re-test phase once your development team applies the initial remediation advice? Drop me a message so we can get started right away.

@ssquare489

Testing the staging build across authenticated, unauthenticated, and mobile flows is the right setup here, especially since you want manual XSS verification and CSP-bypass testing rather than a scanner-only report. I’d approach this as a focused application and network assessment: map routes, inputs, APIs, role boundaries, headers, CSP behavior, third-party integrations, and mobile-facing endpoints, then validate reflected and stored XSS manually with Burp Suite, OWASP ZAP, and targeted custom payloads. I’d keep findings reproducible so your developers can fix issues quickly, with clear impact, exact steps, PoCs, and React-specific remediation guidance. I’m comfortable owning the full testing cycle, documenting evidence as I go, and returning for a concise re-test after fixes. The priority would be clean, verifiable findings and maintainable remediation guidance rather than noisy automated output. A relevant project is FileChannel, a React/Redux platform with mobile apps, role-based access, password-protected documents, WebRTC, Stripe, CRM sync, and real-time messaging, giving me experience around complex authenticated attack surfaces and integrations.

@Hrolgar

Manual XSS testing on a React SPA means the interesting bugs sit past the render layer, in whatever's reflecting into dangerouslySetInnerHTML, template injection through a markdown renderer, or a stale CSP header still allowing unsafe-inline while the meta tag claims otherwise. That gap between declared and enforced CSP is usually where the real finding is, and it's exactly the kind of thing an automated scanner reports as a false negative because it only checks the header exists. I'd run this as attacker emulation rather than a scan pass: manual probing across unauthenticated, authenticated and mobile contexts for reflected, stored and DOM-based XSS, tracing each one to its actual sink in the client code rather than just firing payloads at inputs. Alongside that, a pass on general network-level weaknesses, cookie flags, transport config, anything exposed at the edge, plus concrete verification of whether the CSP can be bypassed given the app's own script sources and third-party includes. Every finding gets a working PoC, not a theoretical description, and remediation advice specific to your stack rather than generic OWASP boilerplate. Given you're not ready to start testing until closer to November, I'm happy to hold the engagement and lock in scope now so there's no delay when the staging window opens. M1: Recon, auth flow mapping, CSP and header baseline, $637.50, 5d. M2: Manual XSS testing, unauthenticated and authenticated contexts, $765, 14d. M3: Mobile context testing, CSP bypass verification, network weakness checks, $637.50, 14d. M4: Report with PoCs and remediation, post-fix retest, $510, 12d. Total 2550 AUD across 45 days. Send me access to the staging environment and any existing architecture notes on the auth flow, and I'll have a tighter breakdown of the first milestone back to you tomorrow.

@thinkbotictech

Hi, I can perform a focused manual XSS assessment of your React application across authenticated roles and the full staging attack surface. I’ll combine Burp Suite/OWASP ZAP with targeted manual testing for reflected/stored XSS, CSP bypasses and input/output handling, then provide reproducible findings, impact, remediation guidance, and a post-fix re-test summary. 1. Which authentication roles and key user workflows should be included in the initial test scope? 2. Do you already have written authorization and staging credentials/API documentation available before testing begins? if looking for expert then lets connect (expereince 7 yrs in development)

@AITSoft

I can conduct a focused, manual XSS penetration test against your React staging application, combining full attack-surface mapping with carefully verified reflected and stored XSS testing. I will assess input handling, rendering contexts, role-based exposure, sanitization boundaries, and Content Security Policy bypass opportunities without touching production. Using Testing / QA, Website Testing, and Penetration Testing practices, I will validate findings with safe proof-of-concept payloads, document exact reproduction steps, explain practical impact, and provide remediation aligned with modern React security patterns. Computer Security considerations will also guide review of CSP behavior, browser execution contexts, and privilege boundaries. The final report will be concise and developer-ready, followed by a focused re-test summary after fixes are deployed. I can work directly from your staging access, supplied user roles, application documentation, and agreed testing boundaries. Could you provide the staging URL, test accounts for each role, CSP configuration, and any explicitly excluded endpoints or workflows? I’m ready to begin promptly and will maintain clear notes throughout the engagement.

@Aqsa4400

Hello, I have thoroughly reviewed your requirement for a skilled penetration tester to conduct a comprehensive Cross-Site Scripting (XSS) penetration test on your React-based web application. I am well-equipped to emulate real-world attacks, map the attack surface, and identify XSS vulnerabilities while adhering to your specific requirements. I am Aqsa Usman, a seasoned professional with 5 years of experience in Website Testing, specializing in penetration testing and security assessments. ✅To get a better sense of my skills, please visit my portfolio: https://www.freelancer.pk/u/Aqsa4400 I am keen to discuss this project further with you. Please initiate a chat so we can delve into the details and kickstart the process. Best regards, Aqsa Usman