CVE-2025-62176

MEDIUM EPSS 16.6%
Published Oct 13, 20258mo ago · Modified Jun 17, 20261w ago
4.3 CVSS 3.1
Medium
Find Similar
Published Oct 13, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

Description

Mastodon is a free, open-source social network server based on ActivityPub. In Mastodon before 4.4.6, 4.3.14, and 4.2.27, the streaming server accepts serving events for public timelines to clients using any valid authentication token, even if those tokens lack the read:statuses scope. This allows OAuth clients without the read scope to subscribe to public channels and receive public timeline events. The impact is limited, as this only affects new public posts published on the public timelines and requires an otherwise valid token, but this may lead to unexpected access to public posts in a limited-federation setting. This issue has been patched in versions 4.4.6, 4.3.14, and 4.2.27. No known workarounds exist.

CVSS Details

Base Score
4.3
Exploitability
2.8
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
16.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-280

Affected Products 3

VendorProductVersionRange
joinmastodonmastodon* <4.2.27
joinmastodonmastodon*≥4.3.0  –  <4.3.14
joinmastodonmastodon*≥4.4.0  –  <4.4.6

References 2

  • github.com https://github.com/mastodon/mastodon/commit/7e98fa9b476fdaed235519f1d527eb956004ba0c
    Patch
  • github.com https://github.com/mastodon/mastodon/security/advisories/GHSA-7gwh-mw97-qjgp
    Vendor Advisory

Remediation

  • github.com https://github.com/mastodon/mastodon/commit/7e98fa9b476fdaed235519f1d527eb956004ba0c
    Patch