#VU50773 Cross-site scripting in Groupware Webmail Edition and Horde_Text_Filter - CVE-2021-26929
Published: February 17, 2021 / Updated: June 17, 2021
Vulnerability identifier: #VU50773
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear
CVE-ID: CVE-2021-26929
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Groupware Webmail Edition
Horde_Text_Filter
Groupware Webmail Edition
Horde_Text_Filter
Software vendor:
Horde Project
Horde Project
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the "preProcess" in Text2html.php. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install updates from vendor's website.