source: http://www.securityfocus.com/bid/10992/info
An HTML injection vulnerability is reported in Sympa. The problem occurs due to a failure of the application to properly sanitize user-supplied input data.
Unsuspecting users viewing the affected page will have attacker-supplied malicious code interpreted by their browser in the security context of the website hosting Sympa.
Attackers may potentially exploit this issue to manipulate web content or to steal cookie-based authentication credentials. It may be possible to take arbitrary actions as the victim user.
Versions 4.1, and all 4.1.x releases are reported vulnerable to this issue.
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