Description

Movable Type contains a stored cross-site scripting vulnerability in the custom block edit page of MT Block Editor. If exploited, an arbitrary script may be executed on a logged-in user's web browser.

Classification

CVE ID: CVE-2025-22888

CVSS Base Severity: MEDIUM

CVSS Base Score: 5.4

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected Products

Vendor: Six Apart Ltd.

Product: Movable Type (8.4.x series)

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.03% (probability of being exploited)

EPSS Percentile: 4.78% (scored less or equal to compared to others)

EPSS Date: 2025-03-20 (when was this score calculated)

References

https://www.movabletype.org/news/2025/02/mt-842-released.html
https://jvn.jp/en/jp/JVN48742353/

Timeline