CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
An XSS issue was discovered in Roundcube Webmail before 1.2.13, 1.3.x before 1.3.16, and 1.4.x before 1.4.10. The attacker can send a plain text e-mail message, with JavaScript in a link reference element that is mishandled by linkref_addindex in rcube_string_replacer.php.
Affected products
roundcube: webmail; fedoraproject: fedora; debian: debian linux
References10
- github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10 Patch
- github.com/roundcube/roundcubemail/compare/1.4.9...1.4.10 Patch
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=978491 Issue TrackingMailing List
- github.com/roundcube/roundcubemail/releases/tag/1.2.13 Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.3.16 Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.4.10 Release Notes
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListRelease Notes
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListRelease Notes
- roundcube.net/download/ Product
- www.alexbirnberg.com/roundcube-xss.html Broken Link
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 33% percentile: 98 · as of 2 November 2026
- CWE
- CWE-79
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