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Vulnerability Details :

CVE-2026-44392

Summary
Assigner-jpcert
Assigner Org ID-ede6fdc4-6654-4307-a26d-3331c018e2ce
Published At-20 May, 2026 | 05:28
Updated At-20 May, 2026 | 05:28
Rejected At-
Credits

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:jpcert
Assigner Org ID:ede6fdc4-6654-4307-a26d-3331c018e2ce
Published At:20 May, 2026 | 05:28
Updated At:20 May, 2026 | 05:28
Rejected At:
â–¼CVE Numbering Authority (CNA)

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.

Affected Products
Vendor
Six Apart Ltd.
Product
Movable Type
Versions
Affected
  • 9.1.1 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type
Versions
Affected
  • 9.0.7 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type
Versions
Affected
  • 8.8.3 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type
Versions
Affected
  • 8.0.10 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Advanced
Versions
Affected
  • 9.1.1 and earlie
Vendor
Six Apart Ltd.
Product
Movable Type Advanced
Versions
Affected
  • 9.0.7 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Advanced
Versions
Affected
  • 8.8.3 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Advanced
Versions
Affected
  • 8.0.10 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Premium
Versions
Affected
  • 9.1.1 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Premium
Versions
Affected
  • 9.0.7 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Premium
Versions
Affected
  • 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)
Vendor
Six Apart Ltd.
Product
Movable Type Premium (Advanced Edition)
Versions
Affected
  • 9.1.1 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Premium (Advanced Edition)
Versions
Affected
  • 9.0.7 and earlier
Vendor
Six Apart Ltd.
Product
Movable Type Premium (Advanced Edition)
Versions
Affected
  • 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier)
Problem Types
TypeCWE IDDescription
CWECWE-862Missing authorization
Type: CWE
CWE ID: CWE-862
Description: Missing authorization
Metrics
VersionBase scoreBase severityVector
3.04.3MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.05.3MEDIUM
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
Version: 3.0
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Version: 4.0
Base score: 5.3
Base severity: MEDIUM
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://movabletype.org/news/2026/05/mt-908-released.html
N/A
https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html
N/A
https://jvn.jp/en/jp/JVN66473735/
N/A
Hyperlink: https://movabletype.org/news/2026/05/mt-908-released.html
Resource: N/A
Hyperlink: https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html
Resource: N/A
Hyperlink: https://jvn.jp/en/jp/JVN66473735/
Resource: N/A
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:vultures@jpcert.or.jp
Published At:20 May, 2026 | 07:16
Updated At:20 May, 2026 | 07:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.05.3MEDIUM
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary3.04.3MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Type: Secondary
Version: 4.0
Base score: 5.3
Base severity: MEDIUM
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 3.0
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-862Primaryvultures@jpcert.or.jp
CWE ID: CWE-862
Type: Primary
Source: vultures@jpcert.or.jp
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://jvn.jp/en/jp/JVN66473735/vultures@jpcert.or.jp
N/A
https://movabletype.org/news/2026/05/mt-908-released.htmlvultures@jpcert.or.jp
N/A
https://www.sixapart.jp/movabletype/news/2026/05/20-1100.htmlvultures@jpcert.or.jp
N/A
Hyperlink: https://jvn.jp/en/jp/JVN66473735/
Source: vultures@jpcert.or.jp
Resource: N/A
Hyperlink: https://movabletype.org/news/2026/05/mt-908-released.html
Source: vultures@jpcert.or.jp
Resource: N/A
Hyperlink: https://www.sixapart.jp/movabletype/news/2026/05/20-1100.html
Source: vultures@jpcert.or.jp
Resource: N/A

Change History

0
Information is not available yet

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Details not found