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How CVE-2025-44108 Works
This stored XSS vulnerability in Flatpress CMS (before v1.4) allows authenticated attackers (with admin access) to inject malicious JavaScript via the gallery captions field. The payload persists in the database and executes when an admin views the gallery, enabling session hijacking, defacement, or privilege escalation. The lack of input sanitization and output encoding in the gallery component leads to arbitrary script execution in the admin panel’s context.
DailyCVE Form:
Platform: Flatpress CMS
Version: < 1.4
Vulnerability: Stored XSS
Severity: Medium
Date: 2025-06-12
Prediction: Patch expected by 2025-07-10
What Undercode Say:
Exploitation:
1. Payload Injection:
<img src=x onerror=alert(document.cookie)>
Inserted into gallery captions via admin panel.
2. Trigger: Visit gallery page to execute payload.
Detection:
grep -r "gallery_caption" /var/www/flatpress/ | grep -i "<script|onerror"
Mitigation:
1. Temporary Fix: Disable gallery module.
// In flatpress config:
define('PLUGIN_GALLERY_DISABLED', true);
2. Input Sanitization Patch:
// Sanitize captions before storage: $caption = htmlspecialchars($_POST['caption'], ENT_QUOTES, 'UTF-8');
3. WAF Rule:
location /admin/ {
modsecurity_rules 'SecRule ARGS "@rx <script" "id:1001,deny,status:403"';
}
Post-Exploit Analysis:
SELECT FROM fp_gallery WHERE caption LIKE '%<%';
Upgrade Command:
wget https://flatpress.org/download/1.4/flatpress-1.4.zip && unzip -o flatpress-1.4.zip -d /var/www/html/
Log Monitoring:
tail -f /var/log/apache2/access.log | grep -E 'POST /admin/gallery|XSS'
Curl PoC:
curl -X POST -d "caption=<script>alert(1)</script>" --cookie "admin_session=VALID_SESSION" http://target/admin/gallery/update
References:
- OWASP XSS Prevention
- Flatpress 1.4 Changelog (post-patch).
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
