Overview #
A Cross-site Scripting (XSS) vulnerability exists in HTMLy CMS. The vulnerability allows remote attackers to inject arbitrary web script or HTML.
Vulnerability Details #
Affected Versions: All versions before patch
Root Cause: Insufficient input validation and output encoding allows attackers to inject malicious scripts.
Exploitation Requirements #
- No authentication required
- Victim must visit a crafted URL or page
Impact #
Remote attackers can exploit this vulnerability to:
- Steal admin session cookies
- Compromise the CMS installation
- Perform actions on behalf of users
Proof of Concept #
Details available upon request.
Solution #
Upgrade to a patched version of HTMLy that includes proper input sanitization.
References #
- Vendor notification sent
Timeline #
2018-01-01— Discovered
Credits: Omar Kurt