Cross-site scripting in Roundcube Webmail - #VU147188
Published: September 6, 2026
Vulnerability identifier: #VU147188
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script.
The vulnerability exists due to improper neutralization of input during web page generation in the HTML editor when processing text/enriched part content. A remote attacker can supply crafted text/enriched part content to execute arbitrary script.
Affected software
Roundcube Webmail
Remediation
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.19, 1.7.4