PT-2025-19771 · Misskey · Misskey

Warriordog · Published 2025-05-05 · Updated 2025-09-03 · CVE-2025-46559

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Misskey versions 12.31.0 through 2025.4.0

Description The issue is related to missing validation in Mk:api, which allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. This is achieved by prefixing a URL with ../ to step out of the /api directory, thereby being able to make requests to other endpoints, such as /files, /url, and /proxy.

Recommendations For versions 12.31.0 through 2025.4.0, update to version 2025.4.1 to resolve the issue. As a temporary workaround, consider restricting access to the Mk:api to minimize the risk of exploitation. Avoid using the ../ prefix in URLs for the affected API endpoints until the issue is resolved.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2025-46559

GHSA-GMQ6-738Q-VJP2

Affected Products

Misskey

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46559.json · Exploit
• https://github.com/misskey-dev/misskey/commit/583df3ec63e25a1fd34def0dac13405396b8b663 · Patch
• https://github.com/misskey-dev/misskey/security/advisories/GHSA-gmq6-738q-vjp2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-46559 · Security Note
• https://osv.dev/vulnerability/CVE-2025-46559 · Vendor Advisory
• https://t.me/cvedetector/24487 · Telegram Post
• https://twitter.com/CVEnew/status/1919465734066807071 · Twitter Post
• https://t.me/cveNotify/134233 · Telegram Post