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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-22"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/46xxx/CVE-2025-46559.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "12.31.0"
},
{
"fixed": "2025.4.1"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "583df3ec63e25a1fd34def0dac13405396b8b663"
}
],
"source": "REFERENCES_COMMIT"
}
]
}