Is CVE-2026-121551 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121551?

CVE-2026-121551 has a CVSS v3 severity of MEDIUM (5.4).

Back

CVE-2026-121551

Description

PostfixAdmin through 4.0.5 contains a stored cross-site scripting vulnerability that allows authenticated mailbox users to inject script by creating a TOTP exception with an unescaped description. When a global administrator views totp-exceptions.php, the script runs in the admin session and can issue authenticated admin requests using the page's CSRF token.