A vulnerability was found in txtForum (Forum Software) (the affected version is unknown). It has been classified as problematic. Affected is an unknown code of the file reply.php. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This is going to have an impact on integrity.

The weakness was presented 03/09/2006 by Nenad Jovanovic (Website). The advisory is available at seclab.tuwien.ac.at. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. Technical details and a exploit are known. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

After before and not just, there has been an exploit disclosed. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:reply.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See 83596, 83597 and 83599 for similar entries.

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• Forum Software

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• txtForum

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