Vulnerability · CVE-2025-54856
Movable Type contains a stored cross-site scripting vulnerability in Edit ContentData page.
Published Oct 23, 2025 · catalog updated Oct 23, 2025 · Six Apart Ltd. Movable Type (Cloud Edition)
Last checked Oct 26, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-54856. EPSS is 0.23%. Act only if a listed version of Six Apart Ltd. Movable Type (Cloud Edition) is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-53522 · Medium
- Severity
- Medium4.6
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.23%
- Remediation
- Vendor / distro source
- Affected products
- vendor Six Apart Ltd. Movable Type (Cloud Edition) 8.7.0 (8 series)
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Six Apart Ltd. Movable Type (Cloud Edition) 8.7.0 (8 series)8.7.0 (8 series)
How to fix CVE-2025-54856
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 8.7.0 (8 series)
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-54856. EPSS is 0.23%. Act only if a listed version of Six Apart Ltd. Movable Type (Cloud Edition) is installed.
Which versions are affected?
Compare what you have installed with Six Apart Ltd. Movable Type (Cloud Edition) 8.7.0 (8 series) 8.7.0 (8 series). Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 23, 2025 · EUVD
Detected
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.
Oct 23, 2025 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2025-54856
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-54856
30-day exploitation probability 0.23%
first.org - EUVDVulnerability recordEUVD-2025-35656
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 26, 2026
- CVE.orgOct 26, 2026
- EUVDOct 26, 2026