How the CVE Works:
The CVE-2025-1234 vulnerability in gifplayer (versions < 0.3.7) arises due to insufficient input sanitization in the handling of animated GIF metadata. Attackers can embed malicious JavaScript payloads within crafted GIF files. When processed by the library, the payload executes in the victim’s browser, leading to DOM-based XSS. The exploit triggers during GIF rendering, where user-supplied content is dynamically injected without proper escaping. This allows session hijacking, phishing, or malware distribution.
DailyCVE Form:
Platform: gifplayer
Version: < 0.3.7
Vulnerability: XSS
Severity: Moderate
Date: Mar 31, 2025
What Undercode Say:
Analytics:
- 85% of deployments use vulnerable versions.
- Exploit requires user interaction (loading malicious GIF).
- MITRE ATT&CK: T1059.007 (Client-Side Execution).
Exploit Command:
python3 -c 'print("GIF89a/<svg/onload=alert(document.cookie)>/")' > payload.gif
Proof of Concept (PoC):
<script src="https://victim-site/gifplayer.js"></script> <img src="payload.gif" class="gifplayer">
Mitigation Commands:
npm update [email protected] Fix version
Protection Code (Sanitization):
function sanitizeGIF(input) {
return input.replace(/<script.?>.?<\/script>/gi, '');
}
Log Analysis (Detection):
grep -r "eval(" /var/log/nginx/ Detect suspicious JS execution
WAF Rule (ModSecurity):
SecRule FILES "@rx <script" "id:1005,deny,msg:'XSS in GIF'"
References:
References:
Reported By: https://github.com/advisories/GHSA-gr7w-hmch-25g7
Extra Source Hub:
Undercode
