High-Tech Bridge SA has discovered multiple vulnerabilities in Pligg CMS, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "q_1_low", "q_2_low", "q_1_high", and "q_2_high" parameters in module.php (when "module" is set to "captcha", "action" is set to "configure", and "captcha" is set to "math") is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
The vulnerabilities are confirmed in version 1.2.2. Other versions may also be affected.
Solution: Edit the source code to ensure that input is properly sanitised.
Provided and/or discovered by: High-Tech Bridge SA
Original Advisory: https://www.htbridge.com/advisory/HTB23089
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