CVE-2022-24307

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-02-03 · updated 2026-06-17
Weakness: CWE-863

Description

Mastodon before 3.3.2 and 3.4.x before 3.4.6 has incorrect access control because it does not compact incoming signed JSON-LD activities. (JSON-LD signing has been supported since version 1.6.0.)

Affected products

mastodon: before 3.3.2; from 3.4.0 before 3.4.6 — fixed in 3.3.2, 3.4.6

How to fix

Upgrade to a fixed version: mastodon 3.3.2, 3.4.6. Check the vendor advisory for mitigations.

References

https://github.com/mastodon/mastodon/releases/tag/v3.3.2
https://github.com/mastodon/mastodon/releases/tag/v3.4.6
https://github.com/mastodon/mastodon/releases/tag/v3.3.2
https://github.com/mastodon/mastodon/releases/tag/v3.4.6

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