ExternalFreelancerRemote$12500–$37500 USD

Comprehensive Web App Security Audit

Summary

Freelancer Client is hiring: Comprehensive Web App Security Audit.

Location: Remote

I need a seasoned security professional to perform an end-to-end audit of our custom web application and the public-facing site that supports it. The focus is firmly on discovering and documenting application-level vulnerabilities—SQL injection, XSS, authentication flaws, insecure APIs, misconfigured headers, anything that could slip past regular QA.

What you'll do:

• Review of server configuration files, access controls, and session management logic

Skills: Penetration Testing, Network Security, Data Protection

Budget: $12500–$37500 USD


Source: Freelancer Client via Remote / Online. Apply on the source website.

Original

I need a seasoned security professional to perform an end-to-end audit of our custom web application and the public-facing site that supports it. The focus is firmly on discovering and documenting application-level vulnerabilities—SQL injection, XSS, authentication flaws, insecure APIs, misconfigured headers, anything that could slip past regular QA.

Scope
• Black-box and white-box testing of every user flow, admin panel, and API endpoint
• Automated scanning with tools such as Burp Suite, OWASP ZAP, Nessus or equivalents, followed by manual verification
• Review of server configuration files, access controls, and session management logic
• Threat modelling to highlight realistic attack paths and business impact

Deliverables
1. Full log set from all automated and manual tests (raw and parsed)
2. A structured vulnerability report: severity rating, PoC steps, affected components, and clear remediation guidance
3. Executive summary for non-technical stakeholders
4. Road-mapped upgrade and hardening recommendations that fit our current tech stack and roadmap

Acceptance Criteria
• No high- or critical-severity issue may be left without a reproducible PoC and fix suggestion
• Reports must be reproducible on our staging environment
• All findings mapped against OWASP Top 10 or relevant CVE references

Please share concise evidence of your previous security audit experience—case studies, sample redacted reports, or relevant certifications (OSCP, CEH, GWAPT). A short availability outline and estimated timeline will help me slot the engagement into our sprint schedule.

Location & Details

SourceFreelancer
Budget$12500–$37500 USD
LocationRemote
Posted2026-05-17 14:59:58
Penetration TestingNetwork SecurityData Protection
Apply on source →

About this listing

This remote opportunity was imported from Freelancer and is shown here for discovery. To apply, follow the link to the original posting.

Skills mentioned:
Penetration TestingNetwork SecurityData Protection