Listen to this Post
How the CVE Works
The vulnerability (CVE-2025-XXXX) in Drupal Lightgallery arises from improper input sanitization in the image gallery module. Attackers can inject malicious JavaScript via crafted image metadata (e.g., s or descriptions) due to insufficient output encoding. When rendered, this payload executes in a victim’s browser, leading to session hijacking, defacement, or phishing. The flaw affects versions before 1.6.0, where user-supplied data is directly embedded in the DOM without proper escaping.
DailyCVE Form
Platform: Drupal Lightgallery
Version: < 1.6.0
Vulnerability: Stored XSS
Severity: Moderate
Date: Jun 11, 2025
Prediction: Patch expected by Jul 10, 2025
What Undercode Say:
Exploitation:
1. Payload Injection:
<img src="x" onerror="alert('XSS')" />
Stored in image metadata (/description).
2. Triggering XSS:
Victims viewing the gallery execute the payload.
Detection:
curl -s "http://target/gallery" | grep -E "script|onerror"
Mitigation:
1. Temporary Fix:
Disable user-submitted metadata.
2. Permanent Fix:
Upgrade to Lightgallery 1.6.0+.
Patch Analysis:
The update implements HTML entity encoding:
htmlspecialchars($user_input, ENT_QUOTES, 'UTF-8');
Exploit Code (PoC):
fetch('/gallery/upload', {
method: 'POST',
body: '=<script>alert(1)</script>'
});
Protection Commands:
Drupal module update: drush pm-update lightgallery
Log Monitoring:
tail -f /var/log/drupal/error.log | grep "XSS"
WAF Rule (ModSecurity):
SecRule ARGS "@contains <script>" "deny,log,msg:'XSS Attempt'"
References:
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
