CVE-2025-25054Network attack vector

Browser script execution via reflected user-page input

Published Feb 19, 2025 · Updated Feb 19, 2025

Reflected cross-site scripting in Movable Type 8.4.1 and earlier allows remote attackers to execute script in a logged-in user's browser. The user information edit page reflects attacker-controlled input without sufficient output neutralization; Six Apart has not disclosed the responsible parameter or code path. Exploitation requires the Multi-Factor Authentication plugin to be enabled and a logged-in user to open a crafted page, permitting script execution in that browser context.

CVSS severity6.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected cross-site scripting in Movable Type 8.4.1 and earlier allows remote attackers to execute script in a logged-in user's browser. The user information edit page reflects attacker-controlled input without sufficient output neutralization; Six Apart has not disclosed the responsible parameter or code path. Exploitation requires the Multi-Factor Authentication plugin to be enabled and a logged-in user to open a crafted page, permitting script execution in that browser context.

The record

CVE
CVE-2025-25054
Published
Feb 19, 2025
Updated
Feb 19, 2025
Vendor
Six Apart Ltd.
Product
Movable Type Advanced
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.5 and earlier
  2. Affected versionversion=8.4.1 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Six Apart Ltd. · Movable Type Advancedversion=8.0.5 and earlier; version=8.4.1 and earlier
Six Apart Ltd. · Movable Type Premium (Cloud Edition)version=2.06 and earlier
Six Apart Ltd. · Movable Type Premiumversion=2.06 and earlier
Six Apart Ltd. · Movable Type Premium (Advanced Edition)version=2.06 and earlier
Six Apart Ltd. · Movable Typeversion=8.0.5 and earlier; version=8.4.1 and earlier
Six Apart Ltd. · Movable Type (Cloud Edition)version=8.4.1 and earlier

Published CVSS scores

6.1JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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