PT-2025-43429 · Six Apart · Movable Type

Published 2025-10-23 · Updated 2025-10-23 · CVE-2025-54856

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Movable Type (affected versions not specified)

Description The software contains a stored cross-site scripting issue in the Edit ContentData page. An attacker with "ContentType Management" privilege can potentially execute arbitrary scripts in a user's web browser by storing crafted input.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-54856

Affected Products

Movable Type

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2025-54856 · Security Note
• https://sixapart.jp/movabletype/news/2025/10/22-1055.html · Note
• https://t.me/CVEtracker/35552 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1981248841245417726 · Twitter Post
• https://movabletype.org/news/2025/10/mt-880-released.html · Note
• https://jvn.jp/en/jp/JVN24333679 · Note
• https://twitter.com/CVEnew/status/1981219884047462531 · Twitter Post
• https://t.me/cveNotify/139973 · Telegram Post