What’s Vulnerable › Vulnerabilities

CVE-2023-5631: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2023-10-26
• EPSS: 76.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-18 · updated 2026-06-17
• Weakness: CWE-79

Description

Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker to load arbitrary JavaScript code.

Affected products

• Debian Linux: 10.0, 11.0, 12.0
• Fedoraproject Fedora: 39
• Roundcube Webmail: before 1.4.15; from 1.5.0 before 1.5.5; from 1.6.0 before 1.6.4 — fixed in 1.4.15, 1.5.5, 1.6.4

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.4.15, 1.5.5, 1.6.4. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2023/11/01/1
• http://www.openwall.com/lists/oss-security/2023/11/01/3
• http://www.openwall.com/lists/oss-security/2023/11/17/2
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054079
• https://github.com/roundcube/roundcubemail/commit/41756cc3331b495cc0b71886984474dc529dd31d
• https://github.com/roundcube/roundcubemail/commit/6ee6e7ae301e165e2b2cb703edf75552e5376613
• https://github.com/roundcube/roundcubemail/issues/9168
• https://github.com/roundcube/roundcubemail/releases/tag/1.4.15
• https://github.com/roundcube/roundcubemail/releases/tag/1.5.5
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.4
• https://lists.debian.org/debian-lts-announce/2023/10/msg00035.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LK67Q46OIEGJCRQUBHKLH3IIJTBNGGX4/

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