Path Traversal in Misskey
CVE-2025-46559
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 `Mk:api` 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 `/api` directory, thereby being able to make requests to other endpoints, such as `/files`, `/url`, and `/proxy`. Version 2025.4.1 fixes the issue.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.004 (31.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:H/A:N.
Affected products
- Misskey
- Misskey-dev Misskey — versions >= 12.31.0, < 2025.4.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-46559?
- CVE-2025-46559 is a medium-severity vulnerability in Misskey, classified under Path Traversal. CVSS score: 5.4/10. Published 2025-05-05.
- How severe is CVE-2025-46559?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2025-46559 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.