Cross-site scripting in Roundcube Webmail - CVE-2020-15562

Vulnerability details

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 passed via a crafted HTML e-mail message with a JavaScript payload in the xmlns (aka XML namespace) attribute of a HEAD element when an SVG element exists. 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.

Affected software

How to mitigate CVE-2020-15562

External References

• https://github.com/roundcube/roundcubemail/commit/3e8832d029b035e3fcfb4c75839567a9580b4f82
• https://github.com/roundcube/roundcubemail/releases/tag/1.2.11
• https://github.com/roundcube/roundcubemail/releases/tag/1.3.14
• https://github.com/roundcube/roundcubemail/releases/tag/1.4.7
• https://www.debian.org/security/2020/dsa-4720

Related Security Bulletins

• Cross-site scripting in Roundcube Webmail
• Debian update for roundcube
• OpenSUSE Linux update for roundcubemail