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.

CVSS v3.1

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0

4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

EPSS

4.94% chance of exploitation in the next 30 days, 92th percentile

Published

2021-02-14

Updated

2024-08-03

Proof-of-concept exploits (1)

• http://packetstormsecurity.com/files/162187/Webmail-Edition-5.2.22-XSS-Remote-Code-Execut…

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/49769

References

• CVE Record
• NVD entry

Related

• CVE-2021-26928
• CVE-2021-26935
• CVE-2021-26927
• CVE-2021-26943
• CVE-2021-26926
• CVE-2021-26947