Medium 4.6Published Oct 23, 2025

CVE-2025-62499Movable Type contains a stored cross-site scripting vulnerability in Edit CategorySet of ContentType page.

Updated under an hour ago (Oct 28, 2026, 7:30 AM ET)

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It affects Six Apart Ltd. Movable Type (Software Edition) and 5 other products. Add what you run to find out whether that includes you.

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Every CVE for Six Apart Ltd. Movable Type (Software Edition)

Exploited in the last 30 days

Movable Type contains a stored cross-site scripting vulnerability in Edit CategorySet of ContentType page. If crafted input is stored by an attacker with "ContentType Management" privilege, an arbitrary script may be executed on the web browser of the user who accesses Edit CategorySet of ContentType page.

CVSS: 4.6 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: jpcert
NVD analysis: Deferred
Record last updated: Oct 23, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Six Apart Ltd. Movable Type (Software Edition) six_apart:movable_type_software_edition (from the name)	8.4.0 to 8.4.3 (8.4 series); 8.0.0 to 8.0.7 (8.0 series); 7 r.5509 and earlier (7 series)	CNA record
Six Apart Ltd. Movable Type Advanced (Software Edition) six_apart:movable_type_advanced_software_edition (from the name)	8.4.0 to 8.4.3 (8.4 series); 8.0.0 to 8.0.7 (8.0 series); 7 r.5509 and earlier (7 series)	CNA record
Six Apart Ltd. Movable Type Premium (Software Edition) six_apart:movable_type_premium_software_edition (from the name)	2.10 and earlier (2 series); 1.67 and earlier (1 series)	CNA record
Six Apart Ltd. Movable Type Premium (Advanced Edition) (Software Edition) six_apart:movable_type_premium_advanced_edition_software_edition (from the name)	2.10 and earlier (2 series); 1.67 and earlier (1 series)	CNA record
Six Apart Ltd. Movable Type (Cloud Edition) six_apart:movable_type_cloud_edition (from the name)	8.7.0 (8 series); 7 r.5509 (7 series)	CNA record
Six Apart Ltd. Movable Type Premium (Cloud Edition) six_apart:movable_type_premium_cloud_edition (from the name)	2.10 (2 series); 1.67 (1 series)	CNA record

References

References

https://movabletype.org/news/2025/10/mt-880-released.html
https://www.sixapart.jp/movabletype/news/2025/10/22-1055.html
https://jvn.jp/en/jp/JVN24333679/

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.