CVE-2021-26929
moderate-risk
Published 2021-02-14
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.
Do I need to act?
~
1.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.1/10
Medium
NETWORK
/ LOW complexity
Affected Products (2)
References (14)
Third Party Advisory
http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross...
Third Party Advisory
https://github.com/horde/webmail/releases
Vendor Advisory
https://www.horde.org/apps/webmail
Third Party Advisory
http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross...
Third Party Advisory
https://github.com/horde/webmail/releases
Vendor Advisory
https://www.horde.org/apps/webmail
34
/ 100
moderate-risk
Severity
23/34 · High
Exploitability
4/34 · Minimal
Exposure
7/34 · Low