Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2025-66402

Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
16/12/2025
Last modified:
06/01/2026

Description

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.

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): Low
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): None
Availability (VA): None
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
7.10
Severity 4.0
HIGH
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x
6.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:* 13.1.0 (including) 2025.12.0 (excluding)
cpe:2.3:a:misskey:misskey:13.0.0:-:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta16:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta21:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta22:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta23:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta24:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta25:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta26:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta27:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta28:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta29:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta30:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta31:*:*:*:*:*:*
cpe:2.3:a:misskey:misskey:13.0.0:beta32:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools