Incorrect authorization in Roundcube Webmail - #VU156155
Published: October 19, 2026
Vulnerability identifier: #VU156155
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to change another account's password and potentially take over that account.
The vulnerability exists due to improper account authorization in the Password Modoboa driver when processing password changes. A remote user can cause a password change to target another account to modify its credentials without authorization.
Affected software
Roundcube Webmail
Remediation
Install security update from vendor's website.
Roundcube Webmail - addressed in versions 1.6.20, 1.7.5