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How CVE-2025-25908 Works
The vulnerability exists in Tianti v2.3’s `//ajax/save` endpoint, where user-supplied input in the `coverImageURL` parameter is improperly sanitized before being stored. An attacker can inject malicious JavaScript or HTML payloads through this parameter. When other users access a page displaying the manipulated (e.g., admin panel or public view), the payload executes in their browser context, enabling session hijacking, defacement, or phishing attacks. The stored nature makes it persistent across sessions.
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Platform: Tianti CMS
Version: 2.3
Vulnerability: Stored XSS
Severity: Critical
Date: 2025-06-23
Prediction: Patch by 2025-08-15
What Undercode Say
curl -X POST -d "coverImageURL=javascript:alert(1)" http://target//ajax/save
fetch('//ajax/save', {
method: 'POST',
body: 'coverImageURL=<script>exfiltrate()</script>'
});
How Exploit
1. Craft malicious payload (e.g., ``).
2. Submit via `coverImageURL` parameter to `//ajax/save`.
3. Wait for victim to load infected .
Protection from this CVE
1. Input sanitization (HTML entity encoding).
2. CSP headers.
3. Patch update.
Impact
1. Session hijacking.
2. Data theft.
3. Admin compromise.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
