The Recommend Page extension for TYPO3 is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.
An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may let the attacker steal cookie-based authentication credentials and launch other attacks.
Typo3 Recommend Page 2.0.3 and prior versions are vulnerable.
Information
Exploit
Attackers can exploit this issue by enticing an unsuspecting user into following a malicious URI.
References: