CVE-2026-54433

HIGH

Roundcube Webmail - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Title source: rule

Description

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, there is Stored Cross-Site Scripting (XSS) via a crafted plain-text email message. The attacker-controlled JavaScript executes within the victim's authenticated session simply by opening or previewing the message (zero-click).

References (1)

Core 1

Core References

https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2

Scores

CVSS v3 7.2

EPSS 0.0031

EPSS Percentile 23.6%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (3)

roundcube/webmail < 1.6.17

Roundcube/Webmail 1.6.0 - 1.6.17

Roundcube/Webmail 1.7.0 - 1.7.2

Published Jul 14, 2026

Tracked Since Jul 14, 2026