CVE-2025-53834
📋 TL;DR
A reflected cross-site scripting (XSS) vulnerability in Caido's toast UI component allows attackers to inject malicious scripts that execute in users' browsers. This affects Caido versions prior to 0.49.0 when using tools like Match&Replace and Scope. Attackers could steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Caido web security auditing toolkit
⚠️ 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 administrator session cookies, gains full control of Caido instance, accesses sensitive security audit data, and pivots to internal networks.
Likely Case
Attacker steals user session cookies, performs unauthorized actions within Caido, or redirects users to malicious sites.
If Mitigated
Script execution blocked by Content Security Policy or browser XSS filters, limiting impact to UI disruption.
🎯 Exploit Status
Exploitation requires user to interact with crafted input in vulnerable tools. No authentication bypass needed beyond user access to those tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.49.0
Vendor Advisory: https://github.com/caido/caido/security/advisories/GHSA-h8jr-c6qq-h7m7
Restart Required: Yes
Instructions:
1. Backup current Caido configuration and data. 2. Stop Caido service. 3. Download and install Caido version 0.49.0 from GitHub releases. 4. Restart Caido service. 5. Verify functionality of Match&Replace and Scope tools.
🔧 Temporary Workarounds
Disable vulnerable tools
allTemporarily disable or restrict access to Match&Replace and Scope tools until patching.
Implement Content Security Policy
allAdd strict CSP headers to block inline script execution.
Add 'Content-Security-Policy: script-src 'self'' to web server configuration
🧯 If You Can't Patch
- Restrict access to Caido to trusted users only via network segmentation
- Implement web application firewall rules to block XSS payload patterns
🔍 How to Verify
Check if Vulnerable:
Check Caido version via web interface or configuration files. If version is below 0.49.0, system is vulnerable.Check Version:
Check Caido web interface dashboard or configuration files for version number.Verify Fix Applied:
After upgrading to 0.49.0, test toast messages in Match&Replace and Scope tools with basic XSS payloads like <script>alert('test')</script> to confirm sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual input patterns in Match&Replace/Scope tool logs containing script tags or JavaScript
Network Indicators:
- HTTP requests with XSS payloads to Caido endpoints
SIEM Query:
source="caido_logs" AND (message="*<script>*" OR message="*javascript:*" OR message="*onerror=*")