Input validation error in Roundcube Webmail - #VU141371
Published: August 9, 2026
Vulnerability identifier: #VU141371
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass remote content blocking.
The vulnerability exists due to improper input validation in remote content blocking when processing a FuncIRI attribute. A remote attacker can use an unclosed url() value in a FuncIRI attribute to bypass remote content blocking.
Affected software
Roundcube Webmail
Remediation
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.18, 1.7.3