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.
History

Wed, 04 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 04 Feb 2026 07:15:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-79
References
Metrics cvssV3_0

{'score': 5.4, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: jpcert

Published: 2026-02-04T07:02:50.465Z

Updated: 2026-02-04T16:08:26.340Z

Reserved: 2026-01-29T02:02:32.381Z

Link: CVE-2026-21393

cve-icon Vulnrichment

Updated: 2026-02-04T16:08:22.360Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-04T07:16:01.027

Modified: 2026-02-04T16:33:44.537

Link: CVE-2026-21393

cve-icon Redhat

No data.