CVE-2024-37903

moderate-risk
Published 2024-07-05

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.

Do I need to act?

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0.84% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.2/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Joinmastodon

References (10)

Patch https://github.com/mastodon/mastodon/commit/a1c7aae28aecf06659c5b18cfa131b37cd15...
Patch https://github.com/mastodon/mastodon/commit/d4bf22b632ea8b1174375c4966a6768ab663...
Release Notes https://github.com/mastodon/mastodon/releases/tag/v4.1.18
Release Notes https://github.com/mastodon/mastodon/releases/tag/v4.2.10
Vendor Advisory https://github.com/mastodon/mastodon/security/advisories/GHSA-xjvf-fm67-4qc3
Patch https://github.com/mastodon/mastodon/commit/a1c7aae28aecf06659c5b18cfa131b37cd15...
Patch https://github.com/mastodon/mastodon/commit/d4bf22b632ea8b1174375c4966a6768ab663...
Release Notes https://github.com/mastodon/mastodon/releases/tag/v4.1.18
Release Notes https://github.com/mastodon/mastodon/releases/tag/v4.2.10
Vendor Advisory https://github.com/mastodon/mastodon/security/advisories/GHSA-xjvf-fm67-4qc3
36
/ 100
moderate-risk
Severity 28/34 · Critical
Exploitability 3/34 · Minimal
Exposure 5/34 · Minimal