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CVE-2025-55706

MEDIUM
5.1
CVSS Score
Published: August 20, 2025 at 04:23 AM UTC
Updated: June 17, 2026 at 09:42 AM UTC
4 products affected across 1 vendorMovable TypeMovable Type PremiumMovable Type Premium Advanced

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Severity
MEDIUM5.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

URL redirection to untrusted site ('Open Redirect') issue exists in Movable Type. If this vulnerability is exploited, an invalid parameter may be inserted into the password reset page, which may lead to redirection to an arbitrary URL.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Movable Type· Sixapart
60%
v ≥ 8.4.0v ≤ 55088.0.0 ≤ v ≤ 8.0.67 r.5508 (7 series)8.6.0 (8 series)
Movable Type Advanced· Sixapart
60%
v ≥ 8.4.0v ≤ 55088.0.0 ≤ v ≤ 8.0.6
Movable Type Premium· Sixapart
60%
v ≤ 1.66v ≤ 2.091.66 (1 series)2.09 (2 series)
Movable Type Premium Advanced· Sixapart
60%
v ≤ 1.66v ≤ 2.09

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: [email protected]
https://jvn.jp/en/jp/JVN76729865/
Source: [email protected]
https://movabletype.org/news/2025/08/mt-843-released.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.1MEDIUMjpcert
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-601

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