Description
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify() function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters (") in the URL. HTMLPurifier (called first via getCleanBody()) preserves literal " characters in text nodes. linkify() then wraps URLs including those " chars inside an unescaped href="..." attribute, breaking out of the href and injecting arbitrary HTML attributes. Version 1.8.213 fixes the issue.
Problem types
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Product status
References
github.com/...escout/security/advisories/GHSA-49pm-xwqj-vwjp
github.com/...escout/security/advisories/GHSA-49pm-xwqj-vwjp
github.com/...ommit/265379b3ae343f06846adc0aa8510643d1eac2df
github.com/...scout-help-desk/freescout/releases/tag/1.8.213