CVE-2024-53388
📋 TL;DR
A DOM Clobbering vulnerability in Mavo v0.3.2 allows attackers to inject malicious HTML elements that can override JavaScript objects and execute arbitrary code. This affects websites using the vulnerable Mavo library version. Attackers can compromise user sessions and perform actions on behalf of victims.
💻 Affected Systems
- Mavo
📦 What is this software?
Mavo by Mavo
⚠️ Risk & Real-World Impact
Worst Case
Full remote code execution leading to complete system compromise, data theft, and lateral movement within the network.
Likely Case
Session hijacking, credential theft, and unauthorized actions performed in the user's context.
If Mitigated
Limited to client-side impact if proper CSP headers and input sanitization are implemented.
🎯 Exploit Status
Proof of concept available in the GitHub gist reference. Exploitation requires tricking users into visiting a malicious page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.3.3 or later
Vendor Advisory: https://github.com/mavoweb/mavo/releases
Restart Required: No
Instructions:
1. Update Mavo to version 0.3.3 or later. 2. Replace the vulnerable library files with patched versions. 3. Clear browser caches to ensure new versions are loaded.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd strict CSP headers to prevent inline script execution and restrict script sources.
Content-Security-Policy: script-src 'self'; object-src 'none';
Input Sanitization
allSanitize all user-controlled HTML inputs before rendering.
🧯 If You Can't Patch
- Disable Mavo functionality until patched
- Implement WAF rules to block suspicious HTML patterns
🔍 How to Verify
Check if Vulnerable:
Check if Mavo version 0.3.2 is loaded in browser developer tools or inspect package.json.Check Version:
grep -r "mavo" package.json | grep versionVerify Fix Applied:
Verify Mavo version is 0.3.3 or later and test with known PoC payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual HTML element injections
- Suspicious script execution patterns
Network Indicators:
- Requests to known malicious domains from Mavo pages
SIEM Query:
source="web_logs" AND (mimeType="text/html" OR uri="*.mavo*") AND (message="*DOM*" OR message="*clobber*")