CVE-2025-15095
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in postmanlabs httpbin versions up to 0.6.1. The vulnerability allows attackers to inject malicious scripts via an unknown function in httpbin/core.py, potentially compromising user sessions or stealing sensitive data. Anyone running vulnerable versions of httpbin is affected, particularly if the service is internet-facing.
💻 Affected Systems
- postmanlabs httpbin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect users to malicious sites, or deface the application interface.
Likely Case
Attackers inject malicious scripts to steal session tokens or user data from users accessing the vulnerable httpbin instance.
If Mitigated
With proper input validation and output encoding, the XSS payloads would be neutralized, preventing script execution.
🎯 Exploit Status
The exploit has been publicly disclosed in GitHub issue #735 and requires no authentication. XSS exploitation typically has low complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch is available as the vendor has not responded. Monitor the GitHub repository for updates: https://github.com/postmanlabs/httpbin
🔧 Temporary Workarounds
Implement WAF rules
allDeploy a web application firewall with XSS detection rules to block malicious payloads.
Disable vulnerable endpoints
allIdentify and disable the specific endpoint(s) in httpbin/core.py that are vulnerable if possible.
🧯 If You Can't Patch
- Isolate the httpbin instance behind a reverse proxy with strict input validation
- Implement Content Security Policy (CSP) headers to restrict script execution sources
🔍 How to Verify
Check if Vulnerable:
Check your httpbin version. If it's 0.6.1 or earlier, you are vulnerable. Test by attempting to inject basic XSS payloads into httpbin endpoints.Check Version:
python -c "import httpbin; print(httpbin.__version__)" or check your deployment method (pip, package manager)Verify Fix Applied:
Since no patch is available, verification would involve testing that workarounds (like WAF rules) are blocking XSS payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual long parameter values in HTTP requests
- Requests containing script tags or JavaScript code in parameters
- Multiple failed requests with XSS-like payloads
Network Indicators:
- HTTP requests with encoded script payloads in query parameters or POST data
- Traffic patterns showing repeated exploitation attempts
SIEM Query:
source="httpbin" AND (http_uri="*<script*" OR http_uri="*javascript:*" OR http_post_data="*<script*")