{"id":"CVE-2023-5631","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-5631","generatedAt":"2026-10-31T10:23:19.748Z","title":"Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability","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\n\nto load arbitrary JavaScript code.","published":"2023-10-18T15:15:09.000Z","lastModified":"2026-06-17T06:48:59.000Z","status":"Analyzed","sourceIdentifier":"security@eset.com","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["roundcube/webmail","debian/debian linux","fedoraproject/fedora"],"epss":{"score":0.76337,"percentile":0.99538,"date":"2026-10-30","history":[{"date":"2026-10-19","score":0.76901,"percentile":0.99547}]},"kev":{"listed":true,"dateAdded":"2023-10-26","dueDate":"2023-11-16","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nhttps://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"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 16 November 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2023/11/01/1","tags":["Mailing List","Third Party Advisory"],"source":"security@eset.com"},{"url":"http://www.openwall.com/lists/oss-security/2023/11/01/3","tags":["Mailing List","Third Party Advisory"],"source":"security@eset.com"},{"url":"http://www.openwall.com/lists/oss-security/2023/11/17/2","tags":["Mailing List","Third Party Advisory"],"source":"security@eset.com"},{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054079","tags":["Mailing List","Patch"],"source":"security@eset.com"},{"url":"https://github.com/roundcube/roundcubemail/commit/41756cc3331b495cc0b71886984474dc529dd31d","tags":["Patch"],"source":"security@eset.com"},{"url":"https://github.com/roundcube/roundcubemail/commit/6ee6e7ae301e165e2b2cb703edf75552e5376613","tags":["Patch"],"source":"security@eset.com"},{"url":"https://github.com/roundcube/roundcubemail/issues/9168","tags":["Exploit","Issue Tracking"],"source":"security@eset.com"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.4.15","tags":["Release Notes"],"source":"security@eset.com"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.5","tags":["Release Notes"],"source":"security@eset.com"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.4","tags":["Release Notes"],"source":"security@eset.com"},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00035.html","tags":["Mailing List","Third Party Advisory"],"source":"security@eset.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LK67Q46OIEGJCRQUBHKLH3IIJTBNGGX4/","tags":["Mailing List"],"source":"security@eset.com"},{"url":"https://roundcube.net/news/2023/10/16/security-update-1.6.4-released","tags":["Release Notes"],"source":"security@eset.com"},{"url":"https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15","tags":["Release Notes"],"source":"security@eset.com"},{"url":"https://www.debian.org/security/2023/dsa-5531","tags":["Mailing List"],"source":"security@eset.com"},{"url":"http://www.openwall.com/lists/oss-security/2023/11/01/1","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2023/11/01/3","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2023/11/17/2","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054079","tags":["Mailing List","Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/roundcube/roundcubemail/commit/41756cc3331b495cc0b71886984474dc529dd31d","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/roundcube/roundcubemail/commit/6ee6e7ae301e165e2b2cb703edf75552e5376613","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/roundcube/roundcubemail/issues/9168","tags":["Exploit","Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.4.15","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.5","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.4","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00035.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LK67Q46OIEGJCRQUBHKLH3IIJTBNGGX4/","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://roundcube.net/news/2023/10/16/security-update-1.6.4-released","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2023/dsa-5531","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-5631","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-5631","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}