CVE-2025-54856
BaseFortify
Publication date: 2025-10-23
Last updated on: 2025-10-27
Assigner: JPCERT/CC
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| six_apart | movable_type | 8.8.0 |
| six_apart | movable_type_premium | 2.11 |
| six_apart | movable_type_premium | 1.68 |
| six_apart | movable_type_cloud | 7_r.5510 |
| six_apart | movable_type | 7_r.5510 |
| six_apart | movable_type_cloud | 8.8.0 |
| six_apart | movable_type | 8.4.4 |
| six_apart | movable_type | 8.0.8 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-54856 is a stored cross-site scripting (XSS) vulnerability in Movable Type software, specifically in the Edit ContentData page. An attacker who has the "ContentType Management" privilege can store crafted input containing malicious scripts. When another user with access to the Edit ContentData page views this input, the malicious script executes in their web browser, potentially compromising their session or data. [2, 3]
How can this vulnerability impact me? :
This vulnerability allows an attacker with elevated privileges to inject malicious scripts that execute in the browsers of users who access the Edit ContentData page. This can lead to loss of confidentiality and integrity of data, as the attacker could potentially steal sensitive information or manipulate content viewed by legitimate users. [2]
What immediate steps should I take to mitigate this vulnerability?
To mitigate CVE-2025-54856, immediately update your Movable Type installation to one of the fixed versions released by Six Apart Ltd. These include Movable Type Software Edition versions 7 r.5510, 8.0.8, 8.4.4, and 8.8.0; Movable Type Premium versions 1.68 and 2.11; and Movable Type Cloud Edition versions 7 r.5510, 1.68, 2.11, and 8.8.0. It is recommended to back up your database before applying updates and preferably install updates in a new directory rather than overwriting existing installations. Applying these updates will fix the stored cross-site scripting vulnerability in the Edit ContentData page and prevent malicious script injection. [1, 2, 3]