CVE-2023-5631

As of 2025-10-30, CVE-2023-5631 is a CVSS 6.1 (MEDIUM-severity) vulnerability. CISA KEV-listed (known exploited). EPSS exploitation probability 83.4%. Threadlinqs Intelligence tracks 0 threats exploiting it.

Last updated: 2025-10-30

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.

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

CWE-79

Exploitation status

CISA KEV-listed (known exploited)

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

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.