misskey.js's export data contains private post data
Summary
| CVE | CVE-2025-66402 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-12-16 00:16:02 UTC |
| Updated | 2026-10-14 13:10:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 7.1 HIGH from [email protected]
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/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
Problem Types: CWE-862 | CWE-862 CWE-862: Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7.1 | HIGH | 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/E:X/C... |
| 4.0 | CNA | DECLARED | 7.1 | HIGH | 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 |
| 3.1 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
LowUser Interaction
NoneConfidentiality
HighIntegrity
NoneAvailability
NoneSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Misskey | Misskey | All | All | All | All |
| Application | Misskey | Misskey | 13.0.0 | - | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta16 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta21 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta22 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta23 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta24 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta25 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta26 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta27 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta28 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta29 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta30 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta31 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta32 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta33 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta34 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta35 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta36 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta37 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta38 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta39 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta40 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta41 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta42 | All | All |
| Application | Misskey | Misskey | 13.0.0 | beta43 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc1 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc10 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc11 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc2 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc3 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc4 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc5 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc6 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc7 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc8 | All | All |
| Application | Misskey | Misskey | 13.0.0 | rc9 | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Misskey-dev | Misskey | affected >= 13.0.0-beta.16, < 2025.12.0 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/misskey-dev/misskey/security/advisories/GHSA-496g-mmpw-j9x3 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | github.com | Exploit, Vendor Advisory |
| github.com/misskey-dev/misskey/commit/dc77d59f8712d3fe0b73cd4af203513383... | [email protected] | github.com | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.