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Vulnerability · Published Aug 20, 2025 · Assigned by jpcert

CVE-2025-53522

Medium 5.3

In plain English

A medium-severity security flaw in Movable Type Advanced (Software Edition) from Six Apart Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).

Severity (CVSS 3.0)5.3Medium
Exploit odds (30 days)0.2%top 93.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Movable Type contains an issue with use of less trusted source. If exploited, tampered email to reset a password may be sent by a remote unauthenticated attacker.

Affected products (as reported)

VendorProductVersions
Six Apart Ltd. Movable Type (Software Edition) 8.0.0 to 8.0.68.4.0 to 8.4.2 (8 series)
Six Apart Ltd. Movable Type (Software Edition) 7 r.5508 and earlier (7 series)
Six Apart Ltd. Movable Type Advanced (Software Edition) 8.0.0 to 8.0.68.4.0 to 8.4.2 (8 series)
Six Apart Ltd. Movable Type Advanced (Software Edition) 7 r.5508 and earlier (7 series)
Six Apart Ltd. Movable Type Premium (Software Edition) 2.09 and earlier (2 series)
Six Apart Ltd. Movable Type Premium (Software Edition) 1.66 and earlier (1 series)
Six Apart Ltd. Movable Type Premium (Advanced Edition) (Software Edition) 2.09 and earlier (2 series)
Six Apart Ltd. Movable Type Premium (Advanced Edition) (Software Edition) 1.66 and earlier (1 series)
Six Apart Ltd. Movable Type (Cloud Edition) 8.6.0 (8 series)
Six Apart Ltd. Movable Type (Cloud Edition) 7 r.5508 (7 series)
Six Apart Ltd. Movable Type Premium (Cloud Edition) 2.09 (2 series)
Six Apart Ltd. Movable Type Premium (Cloud Edition) 1.66 (1 series)

Weakness: CWE-348 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References