misskey up to 13.0.0-beta.16/2025.11.x authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in misskey up to 13.0.0-beta.16/2025.11.x. This impacts an unknown function. The manipulation leads to authorization. This vulnerability is uniquely identified as CVE-2025-66402. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in misskey up to 13.0.0-beta.16/2025.11.x and classified as problematic. This issue affects some unknown processing. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

Misskey is an open source, federated social media platform. Starting in version 13.0.0-beta.16 and prior to version 2025.12.0, an actor who does not have permission to view favorites or clips can can export the posts and view the contents. Version 2025.12.0 fixes the issue.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-66402 since 11/29/2025. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2025.12.0 eliminates this vulnerability. Applying the patch dc77d59f8712d3fe0b73cd4af2035133839cd57b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-862 / CWE-863 / CWE-285
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: misskey 2025.12.0
Patch: dc77d59f8712d3fe0b73cd4af2035133839cd57b

Timelineinfo

11/29/2025 CVE reserved
12/16/2025 +17 days Advisory disclosed
12/16/2025 +0 days VulDB entry created
01/06/2026 +21 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-496g-mmpw-j9x3
Status: Confirmed

CVE: CVE-2025-66402 (🔒)
GCVE (CVE): GCVE-0-2025-66402
GCVE (VulDB): GCVE-100-336587

Entryinfo

Created: 12/16/2025 05:53
Updated: 01/06/2026 21:49
Changes: 12/16/2025 05:53 (67), 01/06/2026 21:49 (11)
Complete: 🔍
Cache ID: 216::103

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