What’s Vulnerable › Vulnerabilities

CVE-2021-44025

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-19 · updated 2026-06-17
• Weakness: CWE-79

Description

Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to XSS in handling an attachment's filename extension when displaying a MIME type warning message.

Affected products

• Debian Linux: 9.0, 10.0, 11.0
• Fedoraproject Fedora: 33, 34
• Roundcube Webmail: before 1.3.17; from 1.4.0 before 1.4.12 — fixed in 1.3.17, 1.4.12

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.3.17, 1.4.12. Check the vendor advisory for mitigations.

References

• https://bugs.debian.org/1000156
• https://github.com/roundcube/roundcubemail/commit/7d7b1dfeff795390b69905ceb63d6391b5b0dfe7
• https://github.com/roundcube/roundcubemail/commit/faf99bf8a2b7b7562206fa047e8de652861e624a
• https://github.com/roundcube/roundcubemail/issues/8193
• https://lists.debian.org/debian-lts-announce/2021/12/msg00004.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NDVGIZMQJ5IOM47Y3SAAJRN5VPANKTKO/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TP3Y5RXTUUOUODNG7HFEKWYNIPIT2NL4/
• https://www.debian.org/security/2021/dsa-5013
• https://bugs.debian.org/1000156
• https://github.com/roundcube/roundcubemail/commit/7d7b1dfeff795390b69905ceb63d6391b5b0dfe7
• https://github.com/roundcube/roundcubemail/commit/faf99bf8a2b7b7562206fa047e8de652861e624a
• https://github.com/roundcube/roundcubemail/issues/8193

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