CVE-2026-21393 – Movable Type Stored Cross-Site Scripting Vulnerability

CVE ID : CVE-2026-21393

Published : Feb. 4, 2026, 7:02 a.m. | 16 minutes ago

Description : Movable Type contains a stored cross-site scripting vulnerability in Edit Comment. If crafted input is stored by an attacker, arbitrary script may be executed on a logged-in user’s web browser. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.

Severity: 5.4 | MEDIUM

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