CVE-2026-35539

MEDIUM

Roundcube Webmail < 1.5.14 - XSS

Title source: rule

Description

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.

References (7)

https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14

https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5

https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f

https://github.com/roundcube/roundcubemail/releases/tag/1.6.14

https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1

https://github.com/roundcube/roundcubemail/releases/tag/1.5.14

https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab

View Patch ZIP pw:eip

Scores

CVSS v3 6.1

EPSS 0.0004

EPSS Percentile 12.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (4)

roundcube/roundcubemail 1.7-beta - 1.7-rc5Packagist

Roundcube/Webmail < 1.5.14

roundcube/webmail < 1.5.14

Roundcube/Webmail 1.6.0 - 1.6.14

Published Apr 03, 2026

Tracked Since Apr 03, 2026