Stored Cross-Site Scripting Vulnerability in Movable Type by Six Apart
CVE-2025-62499

4.6MEDIUM

Key Information:

Vendor

Six Apart Ltd.

Status
Movable Type (software Edition)
Movable Type Advanced (software Edition)
Movable Type Premium (software Edition)
Movable Type Premium (advanced Edition) (software Edition)
Vendor
CVE Published:
23 October 2025

What is CVE-2025-62499?

Movable Type is susceptible to a stored cross-site scripting vulnerability that arises within the Edit CategorySet of ContentType page. Attackers with 'ContentType Management' privileges can inject malicious scripts that are stored in the system. When unsuspecting users access the affected page, these scripts may execute in their browsers, potentially compromising sensitive information and user interactions.

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Affected Version(s)

Movable Type (Cloud Edition) 8.7.0 (8 series)

Movable Type (Cloud Edition) 7 r.5509 (7 series)

Movable Type (Software Edition) 8.4.0 to 8.4.3 (8.4 series)

References

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

CVSS V4

Score:
4.6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

CVSS V3.0

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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