CVE-2021-26929: XSS
First published: Sun Feb 14 2021(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Horde Groupware Webmail Edition | <=5.2.22 | |
| Debian GNU/Linux | =9.0 |
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Reference Links
- http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.html
- https://github.com/horde/webmail/releases
- https://lists.debian.org/debian-lts-announce/2021/02/msg00028.html
- https://lists.horde.org/archives/announce/2021/001298.html
- https://www.alexbirnberg.com/horde-xss.html
- https://www.horde.org/apps/webmail
Frequently Asked Questions
What is the vulnerability ID for this XSS issue in Horde Groupware Webmail Edition?
The vulnerability ID for this XSS issue in Horde Groupware Webmail Edition is CVE-2021-26929.
What is the severity of CVE-2021-26929?
The severity of CVE-2021-26929 is medium (score of 6.1).
What is the affected software version of Horde Groupware Webmail Edition?
The affected software version of Horde Groupware Webmail Edition is up to and including 5.2.22.
What is the Common Weakness Enumeration (CWE) ID associated with this vulnerability?
The Common Weakness Enumeration (CWE) ID associated with this vulnerability is CWE-79.
How can I fix the XSS issue in Horde Groupware Webmail Edition?
To fix the XSS issue in Horde Groupware Webmail Edition, update to a version later than 5.2.22 and ensure that the Horde_Text_Filter library is at least version 2.3.7.
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- agent/author
- agent/references
- agent/first-publish-date
- agent/description
- agent/event
- agent/source
- agent/weakness
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/horde
- canonical/horde groupware webmail edition
- version/horde groupware webmail edition/5.2.22
- vendor/debian
- canonical/debian gnu/linux
- version/debian gnu/linux/9.0