CVE-2025-54856

CVSS 4.6 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.6EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

23 Oct 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Movable Type contains a stored cross-site scripting vulnerability in Edit ContentData 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 ContentData page.

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

Affected products

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

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References

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