Cross-site scripting in Horde Groupware Webmail Edition



Published: 2021-02-17
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-26929
CWE-ID CWE-79
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		Groupware Webmail Edition
Web applications / Webmail solutions

Horde_Text_Filter
Universal components / Libraries / Libraries used by multiple products

Vendor Horde Project

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Cross-site scripting

EUVDB-ID: #VU50773

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-26929

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Groupware Webmail Edition: 5.0.0 - 5.2.22

Horde_Text_Filter: before 2.3.7

CPE2.3 External links

http://github.com/horde/webmail/releases
http://lists.horde.org/archives/announce/2021/001298.html
http://www.alexbirnberg.com/horde-xss.html
http://www.horde.org/apps/webmail


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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