VulnerabilityModified
CVE-2021-26929
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).
MEDIUM 6.1EPSS 4.94%
Does this matter?
Lower severity and a low EPSS score (4.94%). Track it; it rarely justifies an emergency change on its own.
Description
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 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 4.94% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- horde/groupware · debian/debian linux
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.htmlThird Party Advisory
- https://github.com/horde/webmail/releasesThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00028.htmlMailing List, Third Party Advisory
- https://lists.horde.org/archives/announce/2021/001298.htmlMailing List, Vendor Advisory
- https://www.alexbirnberg.com/horde-xss.htmlExploit, Third Party Advisory
- https://www.horde.org/apps/webmailVendor Advisory
- http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.htmlThird Party Advisory
- https://github.com/horde/webmail/releasesThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00028.htmlMailing List, Third Party Advisory
- https://lists.horde.org/archives/announce/2021/001298.htmlMailing List, Vendor Advisory
- https://www.alexbirnberg.com/horde-xss.htmlExploit, Third Party Advisory
- https://www.horde.org/apps/webmailVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.