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CVE-2025-62605

Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon version 4.4, support for verifiable quote posts with quote controls was added, but it is possible for an attacker to bypass these controls in Mastodon versions prior to 4.4.8 and 4.5.0-beta.2. Mastodon internally treats reblogs as statuses. Since they were not special-treated, an attacker could reblog any post, then quote their reblog, technically quoting themselves, but having the quote feature a preview of
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e3a1581d53525c166a0aa3e054b7ead0f49cd247de2d1dbd5fd711d367db8031
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"mastodon","vendor":"mastodon","versions":[{"status":"affected","version":">= 4.4.0-beta.1, < 4.4.8"},{"status":"affected","version":"= 4.5.0-beta.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-754","description":"CWE-754: Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"https://github.com/mastodon/mastodon/commit/2dc4552229b55e2e4adaef675e68ed7ae123d78e","tags":["x_refsource_MISC"],"url":"https://github.com/mastodon/mastodon/commit/2dc4552229b55e2e4adaef675e68ed7ae123d78e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/references/1
{"name":"https://github.com/mastodon/mastodon/commit/405a49df44033e7d179f3d44d59fb68a67d54789","tags":["x_refsource_MISC"],"url":"https://github.com/mastodon/mastodon/commit/405a49df44033e7d179f3d44d59fb68a67d54789"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/references/2
{"name":"https://github.com/mastodon/mastodon/releases/tag/v4.4.8","tags":["x_refsource_MISC"],"url":"https://github.com/mastodon/mastodon/releases/tag/v4.4.8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/references/3
{"name":"https://github.com/mastodon/mastodon/releases/tag/v4.5.0-beta.2","tags":["x_refsource_MISC"],"url":"https://github.com/mastodon/mastodon/releases/tag/v4.5.0-beta.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/references/4
{"name":"https://github.com/mastodon/mastodon/security/advisories/GHSA-8h43-rcqj-wpc6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mastodon/mastodon/security/advisories/GHSA-8h43-rcqj-wpc6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c448dafa04260b6929bb1e2be13b2af064feb7e7a30f781d0331cb307937934f · sha256:caee454f46b905e7… · /containers/cna/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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