What’s Vulnerable › Vulnerabilities
CVE-2021-26925
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-02-09 · updated 2026-06-17
- Weakness: CWE-79
Description
Roundcube before 1.4.11 allows XSS via crafted Cascading Style Sheets (CSS) token sequences during HTML email rendering.
Affected products
- Fedoraproject Fedora: 32, 33
- Roundcube Webmail: before 1.4.11 — fixed in 1.4.11
How to fix
Upgrade to a fixed version: Roundcube Webmail 1.4.11. Check the vendor advisory for mitigations.
References
- https://github.com/roundcube/roundcubemail/commit/9dc276d5f26042db02754fa1bac6fbd683c6d596
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5QPAMYM2DQODSCQIAVNFJR2ETG7WMJOD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q752JPOHTR6H72FK3EIPJZ5O24Z7RGLM/
- https://roundcube.net/news/2021/02/08/security-update-1.4.11
- https://github.com/roundcube/roundcubemail/commit/9dc276d5f26042db02754fa1bac6fbd683c6d596
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5QPAMYM2DQODSCQIAVNFJR2ETG7WMJOD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q752JPOHTR6H72FK3EIPJZ5O24Z7RGLM/
- https://roundcube.net/news/2021/02/08/security-update-1.4.11
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