Description
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, the administrative statistics endpoints handled by Api::V1::Admin::MeasuresController and Api::V1::Admin::RetentionController checked authorization only after beginning expensive calculations. Anonymous callers could submit keys, start_at, and end_at parameters that caused long-running SQL queries in Admin::Metrics::Measure, Admin::Metrics::Retention, and Admin::Metrics::Dimension::BaseDimension, allowing repeated requests to exhaust server resources. This issue is fixed in versions 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1.
References9
- github.com/mastodon/mastodon/commit/18c61f286f1f5718a8f517940ba…
- github.com/mastodon/mastodon/commit/467c933459c7d0e5513475b9e48…
- github.com/mastodon/mastodon/commit/930aa9fee26bf9eaefe27826fa1…
- github.com/mastodon/mastodon/commit/da47a1bd3cd07935d7ca55a1f4f…
- github.com/mastodon/mastodon/releases/tag/v4.4.21
- github.com/mastodon/mastodon/releases/tag/v4.5.14
- github.com/mastodon/mastodon/releases/tag/v4.6.4
- github.com/mastodon/mastodon/releases/tag/v4.7.0-beta.1
- github.com/mastodon/mastodon/security/advisories/GHSA-7jvv-fhmg…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 58 · as of 12 November 2026
- CWE
- CWE-405CWE-770
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.