CVE-2021-26929

Description

An XSS issue was discovered in Horde Groupware Webmail Edition through 5.2.22 (where the Horde_Text_Filter library before 2.3.7 is used). The attacker can send a plain text e-mail message, with JavaScript encoded as a link or email that is mishandled by preProcess in Text2html.php, because bespoke use of \x00\x00\x00 and \x01\x01\x01 interferes with XSS defenses.

References

https://www.horde.org/apps/webmail

https://www.alexbirnberg.com/horde-xss.html

https://lists.horde.org/archives/announce/2021/001298.html

https://lists.debian.org/debian-lts-announce/2021/02/msg00028.html

https://github.com/horde/webmail/releases

http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.html

http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3