Vulnerability identifier: #VU27498

Vulnerability risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12625

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Roundcube
Web applications / Webmail solutions

Vendor: Roundcube

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 "rcube_washtml.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 update from vendor's website.

Vulnerable software versions

Roundcube: 1.4.0 - 1.4.3, 1.3.0 - 1.3.10, 1.2.0 - 1.2.9, 1.1.0 - 1.1.12, 1.0.0 - 1.0.12, 0.9.0 - 0.9.5, 0.8.0 - 0.8.7, 0.7 - 0.7.4, 0.5 - 0.5.4, 0.4 - 0.4.2, 0.3 - 0.3.1, 0.2 - 0.2.2, 0.1 - 0.1.1

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External links
http://github.com/roundcube/roundcubemail/commit/87e4cd0cf2c550e77586860b94e5c75d2b7686d0
http://github.com/roundcube/roundcubemail/compare/1.4.3...1.4.4
http://github.com/roundcube/roundcubemail/releases/tag/1.4.4
http://roundcube.net/news/2020/04/29/security-updates-1.4.4-1.3.11-and-1.2.10

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.