XSS Vulnerability in Horde Groupware Webmail Edition by Horde
CVE-2021-26929

6.1MEDIUM

Key Information:

Vendor

Horde

Status
Groupware
Vendor
CVE Published:
14 February 2021

What is CVE-2021-26929?

A Cross-Site Scripting (XSS) vulnerability exists in the Horde Groupware Webmail Edition through version 5.2.22, where the Horde_Text_Filter library versions prior to 2.3.7 are utilized. Attackers can exploit this flaw by sending crafted plain text emails containing malicious JavaScript. The vulnerability arises from the improper processing of encoded characters in the preProcess function of Text2html.php, allowing attackers to bypass XSS defenses. This could lead to unauthorized access and manipulation of user sessions.

References

https://github.com/horde/webmail/releases
x_refsource_MISC
https://www.horde.org/apps/webmail
x_refsource_MISC
https://www.alexbirnberg.com/horde-xss.html
x_refsource_MISC

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.