CVE-2026-44392 PUBLISHED

Assigner: jpcert
Reserved: 18.05.2026 Published: 20.05.2026 Updated: 20.05.2026

Missing authorization vulnerability exists in Movable Type. Under certain conditions, when a user without administrator privileges signs in to the product, unintended update processing may be executed.

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 4.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Six Apart Ltd.
Product	Movable Type
Versions	Version 9.1.1 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type
Versions	Version 9.0.7 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type
Versions	Version 8.8.3 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type
Versions	Version 8.0.10 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Advanced
Versions	Version 9.1.1 and earlie is affected

Vendor	Six Apart Ltd.
Product	Movable Type Advanced
Versions	Version 9.0.7 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Advanced
Versions	Version 8.8.3 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Advanced
Versions	Version 8.0.10 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Premium
Versions	Version 9.1.1 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Premium
Versions	Version 9.0.7 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Premium
Versions	Version 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier) is affected

Vendor	Six Apart Ltd.
Product	Movable Type Premium (Advanced Edition)
Versions	Version 9.1.1 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Premium (Advanced Edition)
Versions	Version 9.0.7 and earlier is affected

Vendor	Six Apart Ltd.
Product	Movable Type Premium (Advanced Edition)
Versions	Version 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier) is affected

CVE-2026-44392 PUBLISHED

Metrics

Product Status

References

Problem Types