CVE-2026-44392

CVSS 5.3 MEDIUMEPSS 0.2%CWE-862

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

20 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Missing authorization vulnerability exists in Movable Type. Under certain conditions, when a user without administrator privileges signs in to the product, unintended update processing may be executed.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Affected products

Six Apart Ltd. · Movable Type Six Apart Ltd. · Movable Type Advanced Six Apart Ltd. · Movable Type Premium Six Apart Ltd. · Movable Type Premium (Advanced Edition)

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References

https://jvn.jp/en/jp/JVN66473735/https://movabletype.org/news/2026/05/mt-908-released.html https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html