CrYpTiC MauleR has discovered a vulnerability in the Fizzle extension for Firefox, which can be exploited by malicious people to conduct script insertion attacks.
The vulnerability is caused due to input validation errors in the processing of RSS feeds. This can e.g. be exploited to insert and execute arbitrary HTML and script code in a local context by tricking a user into adding a malicious feed and then viewing its contents.
The vulnerability is confirmed in version 0.5. Other versions may also be affected.
Solution: Do not subscribe to untrusted XML feeds.
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Subject: Fizzle Extension for Firefox Feed Script Insertion Vulnerability
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