Password Reset Exploit in Movable Type Software by Six Apart
CVE-2025-53522

6.9MEDIUM

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:
20 August 2025

What is CVE-2025-53522?

Movable Type has a vulnerability that arises from the handling of untrusted sources. This security flaw permits an unauthorized remote attacker to forge a password reset email, potentially leading to unauthorized account access. By exploiting this vulnerability, attackers can manipulate email communications critical to user account integrity, emphasizing the need for immediate updates and security audits by users of the affected versions.

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Affected Version(s)

Movable Type (Cloud Edition) 8.6.0 (8 series)

Movable Type (Cloud Edition) 7 r.5508 (7 series)

Movable Type (Software Edition) 8.0.0 to 8.0.6

References

https://movabletype.org/news/2025/08/mt-843-released.html
https://jvn.jp/en/jp/JVN76729865/

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

CVSS V3.0

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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