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Vulnerability record · CVE-2022-24307 · published 3 February 2022

CVE-2022-24307: Joinmastodon mastodon incorrect authorization vulnerability

Joinmastodon · Mastodon

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.)

9.8 CVSS 3.1 Critical EPSS 1.4% · top 28.1% CWE-863 · Incorrect authorization
9.8CVSS 3.1 base score, v2 7.5
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/mastodon/mastodon/releases/tag/v3.3.2 Release NotesThird Party Advisory
https://github.com/mastodon/mastodon/releases/tag/v3.4.6 Release NotesThird Party Advisory
https://github.com/mastodon/mastodon/releases/tag/v3.3.2 Release NotesThird Party Advisory
https://github.com/mastodon/mastodon/releases/tag/v3.4.6 Release NotesThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-24307), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.