CVE-2024-37903
HIGH8.2EPSS 0.84%Mastodon has improper authorship check on audience extension for existing posts
Published: 7/9/2024Modified: 10/15/2025
Description
Mastodon is a self-hosted, federated microblogging platform. Starting in version 2.6.0 and prior to versions 4.1.18 and 4.2.10, by crafting specific activities, an attacker can extend the audience of a post they do not own to other Mastodon users on a target server, thus gaining access to the contents of a post not intended for them. Versions 4.1.18 and 4.2.10 contain a patch for this issue.
Affected packages (1)
- Bitnami/mastodon>= 2.6.0, < 4.1.18, >= 4.2.0, < 4.2.10
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
References (6)
- WEBhttps://github.com/mastodon/mastodon/commit/a1c7aae28aecf06659c5b18cfa131b37cd1512a3
- WEBhttps://github.com/mastodon/mastodon/commit/d4bf22b632ea8b1174375c4966a6768ab66393b6
- WEBhttps://github.com/mastodon/mastodon/releases/tag/v4.1.18
- WEBhttps://github.com/mastodon/mastodon/releases/tag/v4.2.10
- WEBhttps://github.com/mastodon/mastodon/security/advisories/GHSA-xjvf-fm67-4qc3
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2024-37903