Vulnerability Monitor

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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). 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.

Published

2021-02-14T04:15:12.777

Last Modified

2024-11-21T05:57:04.023

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.1 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-79

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	horde	groupware	≤ 5.2.22	Yes
Operating System	debian	debian_linux	9.0	Yes

References

http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry ([email protected])
http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.html Third Party Advisory ([email protected])
https://github.com/horde/webmail/releases Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2021/02/msg00028.html Mailing List, Third Party Advisory ([email protected])
https://lists.horde.org/archives/announce/2021/001298.html Mailing List, Vendor Advisory ([email protected])
https://www.alexbirnberg.com/horde-xss.html Exploit, Third Party Advisory ([email protected])
https://www.horde.org/apps/webmail Vendor Advisory ([email protected])
http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/162194/Horde-Groupware-Webmail-5.2.22-Cross-Site-Scripting.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/horde/webmail/releases Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2021/02/msg00028.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.horde.org/archives/announce/2021/001298.html Mailing List, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.alexbirnberg.com/horde-xss.html Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.horde.org/apps/webmail Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)