ImpressCMS 1.3.10 - Reflected and Stored XSS

Overview #

Multiple Cross-site Scripting (XSS) vulnerabilities exist in ImpressCMS version 1.3.10, including both Reflected and Stored XSS. These vulnerabilities allow remote attackers to inject arbitrary web script or HTML.

Vulnerability Details #

Affected Versions: 1.3.10 and earlier

Root Cause: Insufficient input validation and output encoding allows both reflected and stored XSS attacks.

Exploitation Requirements #

• No authentication required for reflected XSS
• Authentication may be required for stored XSS

Impact #

Remote attackers can exploit these vulnerabilities to:

• Steal user session cookies
• Perform actions on behalf of users
• Persistently inject malicious content

Proof of Concept #

Details available upon request.

Solution #

Upgrade to a patched version of ImpressCMS that includes proper input sanitization.

References #

• Vendor notification sent

Timeline #

• 2018-01-01 — Discovered

Credits: Omar Kurt