CVE-2025-23039
📋 TL;DR
A Cross-Site Scripting (XSS) vulnerability in Caido v0.45.0 allows attackers to execute arbitrary JavaScript in the URL decoding tooltip of HTTP request/response editors. This could lead to session hijacking, credential theft, or other malicious actions. All users of Caido v0.45.0 are affected.
💻 Affected Systems
- Caido
⚠️ 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
Attacker steals authentication tokens, gains full access to Caido instance, and pivots to internal systems or steals sensitive security audit data.
Likely Case
Attacker steals session cookies or authentication tokens, gaining unauthorized access to the Caido web interface and potentially compromising security audit results.
If Mitigated
Limited impact due to proper network segmentation and access controls, with potential for minor data exposure but no system compromise.
🎯 Exploit Status
Exploitation requires user interaction with crafted content in the URL decoding tooltip. No authentication bypass needed once user accesses malicious content.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.45.1
Vendor Advisory: https://github.com/caido/caido/security/advisories/GHSA-3mfw-fhfp-mgrv
Restart Required: Yes
Instructions:
1. Stop Caido service. 2. Backup configuration and data. 3. Download Caido v0.45.1 from official sources. 4. Install/upgrade to v0.45.1. 5. Restart Caido service. 6. Verify functionality.
🧯 If You Can't Patch
- Restrict network access to Caido web interface to trusted users only using firewall rules or VPN.
- Implement Content Security Policy (CSP) headers if supported by Caido configuration.
🔍 How to Verify
Check if Vulnerable:
Check Caido version via web interface or configuration files. If version is exactly 0.45.0, system is vulnerable.Check Version:
Check Caido web interface dashboard or configuration files for version information.Verify Fix Applied:
Verify Caido version shows 0.45.1 or higher in web interface or configuration.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript execution in web interface logs
- Multiple failed authentication attempts following suspicious web activity
Network Indicators:
- Unusual outbound connections from Caido server
- Suspicious HTTP requests containing script tags or encoded payloads
SIEM Query:
web_logs WHERE (url CONTAINS "<script>" OR url CONTAINS "javascript:") AND application="caido"