CVE-2026-35539CWE-79

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14

Medium · published April 3, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
28.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00354 · 28.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-04-03T03:39Z
EPSS history
Timeline
  • 03 APR 03:39Z
    An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14
    cvelistv5