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CVE-2019-12970

Description

XSS was discovered in SquirrelMail through 1.4.22 and 1.5.x through 1.5.2. Due to improper handling of RCDATA and RAWTEXT type elements, the built-in sanitization mechanism can be bypassed. Malicious script content from HTML e-mail can be executed within the application context via crafted use of (for example) a NOEMBED, NOFRAMES, NOSCRIPT, or TEXTAREA element.

POC

Reference

- http://packetstormsecurity.com/files/153495/SquirrelMail-1.4.22-Cross-Site-Scripting.html

- https://seclists.org/bugtraq/2019/Jul/0

- https://seclists.org/bugtraq/2019/Jul/50

- https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-016.txt

Github

- https://github.com/hannob/squirrelpatches