CVE-2023-5631
Stored XSS vulnerability in Roundcube
Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA notes
https://roundcube.net/news/2023/10/16/security-update-1.6.4-released, https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15 ; https://nvd.nist.gov/vuln/detail/CVE-2023-5631
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.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation Context
as of October 13, 2026- CISA added CVE-2023-5631 to the KEV catalog 8 days after its CVE record was published. The median for entries added in 2023 is 12 days.
- It is one of 11 Roundcube entries in the CISA KEV catalog, and one of 4 added in 2023.
- Its current EPSS score (75.9%) is higher than that of 61% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Roundcube | Roundcube Roundcubemail | 1.6.0 to <1.6.3 1.5.0 to <1.5.4 1.4.0 to <1.5.14 1.6.4 (unaffected) 1.5.5 (unaffected) 1.5.15 (unaffected) |
References
15 Links- https://github.com/roundcube/roundcubemail/commit/6ee6e7ae301e165e2b2cb703edf75552e5376613
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.4
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.5
- https://github.com/roundcube/roundcubemail/releases/tag/1.4.15
- https://github.com/roundcube/roundcubemail/issues/9168
- https://roundcube.net/news/2023/10/16/security-update-1.6.4-released
- https://github.com/roundcube/roundcubemail/commit/41756cc3331b495cc0b71886984474dc529dd31d
- https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054079
- https://www.debian.org/security/2023/dsa-5531
- https://lists.debian.org/debian-lts-announce/2023/10/msg00035.html
- http://www.openwall.com/lists/oss-security/2023/11/01/1
- http://www.openwall.com/lists/oss-security/2023/11/01/3
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LK67Q46OIEGJCRQUBHKLH3IIJTBNGGX4/
- http://www.openwall.com/lists/oss-security/2023/11/17/2
Record Details
More from Roundcube
RoundCube Webmail Deserialization of Untrusted Data Vulnerability
RoundCube Webmail Cross-Site Scripting Vulnerability
Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
RoundCube Webmail Cross-Site Scripting (XSS) Vulnerability
Related
Tool categories
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.