CVE-2024-37903
Mastodon has improper authorship check on audience extension for existing posts
8.2
HIGH
CVSS 3.1
EPSS 0.84%
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.
How to fix CVE-2024-37903
To remediate CVE-2024-37903, upgrade the affected package to a fixed version below.
- —upgrade to 4.1.18 or later
Is CVE-2024-37903 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 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 |