VDB
CVE-2021-26929
CVE-2021-26929
PUBLISHED
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.
EPSS 1.52% · 81.6th percentile
Risk Scores
EPSS Score
1.52%
81.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | php-horde-text-filter | 0, 2.3.5-1, 2.3.5-1ubuntu1 |
| Ubuntu:16.04:LTS | php-horde-text-filter | 0, 2.3.2-1, 2.3.2-2 |
Exploit Intelligence
- http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.html (nist-nvd)
- https://www.alexbirnberg.com/horde-xss.html (nist-nvd)
- CIRCL seen: CVE-2021-26929 (circl-sighting)
- https://github.com/horde/webmail/releases (circl)
- https://www.horde.org/apps/webmail (circl)
- https://lists.horde.org/archives/announce/2021/001298.html (circl)
- [debian-lts-announce] 20210219 [SECURITY] [DLA 2564-1] php-horde-text-filter security update (circl)
- http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.html (circl)
- htmly 2.8.0 Cross Site Scripting Exploit (0day-today)
- htmly 2.8.0 Cross Site Scripting Exploit (0day-today)
…and 2 more exploits
Timeline
- Feb 14, 2021 CVE Published
- Apr 14, 2021 PoC Published
- Apr 14, 2021 EPSS Score
- Apr 15, 2021 PoC Published
- Apr 16, 2021 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 15, 2022 EPSS Score
- Mar 7, 2023 EPSS Score
- Aug 3, 2024 CVE Updated
- Nov 1, 2024 EPSS Score
- Nov 14, 2024 PoC Published
- Dec 17, 2024 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-26929 third-party-advisory
- https://lists.horde.org/archives/announce/2021/001298.html third-party-advisory
- https://github.com/horde/Text_Filter/commit/c26f938854c36b981558a3b1b9b2f81403cff60e third-party-advisory
- https://github.com/horde/Text_Filter/commit/a2f67da064d7a91440b7a2448e56a6387ab94c67 third-party-advisory
- https://www.alexbirnberg.com/horde-xss.html third-party-advisory
- https://github.com/horde/webmail/releases third-party-advisory
- https://www.horde.org/apps/webmail third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-26929 third-party-advisory