CVE-2021-26929
MEDIUM 6.1EPSS 4.9%
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.
- CVSS v3.1 NVD
- 6.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS v2.0 NVD
- 4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N - EPSS
- 4.94% chance of exploitation in the next 30 days, 92nd percentile
- Published
- 2021-02-14
- Updated
- 2024-08-03
Proof-of-concept exploits (1)
ExploitDB entries (1)
Security advisories
- https://lists.horde.org/archives/announce/2021/001298.html
- https://www.horde.org/apps/webmail
- http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scr…
- horde/webmail/releases
- https://lists.debian.org/debian-lts-announce/2021/02/msg00028.html
- https://www.alexbirnberg.com/horde-xss.html