CVE-2025-62175

Mastodon streaming API fails to disconnect disabled and suspended users

MEDIUM

4.3

CVSS Score

Published: October 13, 2025 at 08:59 PM UTC

Updated: October 19, 2026 at 04:10 PM UTC

2 products affected across 2 vendorsMastodonMastodon

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Severity

MEDIUM4.3

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

Mastodon is an open source, federated social network server. In versions before 4.4.6, 4.3.14, and 4.2.27, disabling or suspending a user account does not disconnect the account from the streaming API. This allows disabled or suspended accounts to continue receiving real-time updates through existing streaming connections and to establish new streaming connections, even though they cannot interact with other API endpoints. This undermines moderation actions, as administrators expect disabled or suspended accounts to be fully disconnected from the service. This issue has been patched in versions 4.4.6, 4.3.14, and 4.2.27. No known workarounds exist.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mastodon · Joinmastodon

95%

v < 4.2.274.3.0 ≤ v < 4.3.144.4.0 ≤ v < 4.4.6

Mastodon · Mastodon

90%

v < 4.2.27

Affected range stops below 4.2.27, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.3.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.4.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMVendor Advisory

Source: cverecord

https://github.com/mastodon/mastodon/security/advisories/GHSA-r2fh-jr9c-9pxh

x_refsource_MISCPatch

Source: cverecord

https://github.com/mastodon/mastodon/commit/2971ac9863b91372e68ac152caf6f4dbff511d17

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-273CWE-274

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