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CVE-2025-66402

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:020fab78c0fb672712fecde34df3a2a32bded4bacfa9addd99faaf48e9f2d4e5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"misskey","vendor":"misskey-dev","versions":[{"status":"affected","version":">= 13.0.0-beta.16, < 2025.12.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:434385df9a1c16239ac654c39b1ef39392975ff994e6c0554ca3a2ed806ff73a · sha256:fd44b83974b11e1c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.1,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:434385df9a1c16239ac654c39b1ef39392975ff994e6c0554ca3a2ed806ff73a · sha256:fd44b83974b11e1c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:434385df9a1c16239ac654c39b1ef39392975ff994e6c0554ca3a2ed806ff73a · sha256:fd44b83974b11e1c… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/misskey-dev/misskey/commit/dc77d59f8712d3fe0b73cd4af2035133839cd57b","tags":["x_refsource_MISC"],"url":"https://github.com/misskey-dev/misskey/commit/dc77d59f8712d3fe0b73cd4af2035133839cd57b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:434385df9a1c16239ac654c39b1ef39392975ff994e6c0554ca3a2ed806ff73a · sha256:fd44b83974b11e1c… · /containers/cna/references/1
{"name":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-496g-mmpw-j9x3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-496g-mmpw-j9x3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:434385df9a1c16239ac654c39b1ef39392975ff994e6c0554ca3a2ed806ff73a · sha256:fd44b83974b11e1c… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-496g-mmpw-j9x3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:434385df9a1c16239ac654c39b1ef39392975ff994e6c0554ca3a2ed806ff73a · sha256:fd44b83974b11e1c… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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