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Vulnerabilities

Vulnerability · CVE-2025-46559

Misskey is an open source, federated social media platform.

Published May 5, 2025 · catalog updated May 5, 2025 · Misskey is an open

Check if you run it

No confirmed exploitation is on record for CVE-2025-46559. EPSS is 0.45%. Act only if a listed version of Misskey is an open is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Misskey is an open).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Version ranges on file
Affected products
vendor misskey-dev misskey 12.31.0, < 2025.4.1

Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malicious AiScript code to prefix a URL with to step out of the directory, thereby being able to make requests to other endpoints, such as , , and . Version 2025.4.1 fixes the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor misskey-dev misskey 12.31.0, < 2025.4.112.31.0, < 2025.4.1

How to fix CVE-2025-46559

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-46559. EPSS is 0.45%. Act only if a listed version of Misskey is an open is installed.

Which versions are affected?

Compare what you have installed with misskey-dev misskey 12.31.0, < 2025.4.1 12.31.0, < 2025.4.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 5, 2025 · EUVD

    Detected

    Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malicious AiScript code to prefix a URL with to step out of the directory, thereby being able to make requests to other endpo

  2. May 5, 2025 · EUVD

    Updated

    Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malicious AiScript code to prefix a URL with to step out of the directory, thereby being able to make requests to other endpo

Sources

  • CVE.orgVulnerability recordCVE-2025-46559

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-46559

    30-day exploitation probability 0.4%

    first.org
  • EUVDVulnerability recordEUVD-2025-13506

    Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malic

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.