{"id":"CVE-2025-66482","revision":"d50d7eff1b2e4d068c58d4c8042371bc","records":[{"revision":"d50d7eff1b2e4d068c58d4c8042371bc","observedAt":"2026-10-25T03:17:36.152+00:00","statement":{"source":"nvd","id":"CVE-2025-66482","aliases":[],"title":"Misskey is an open source, federated social media platform. Attackers who use an untrusted reverse proxy or not using a reverse proxy at all can bypass IP rate limiting by adding a forged X-Forwarded-For header. Starting with version 2025.9…","description":"Misskey is an open source, federated social media platform. Attackers who use an untrusted reverse proxy or not using a reverse proxy at all can bypass IP rate limiting by adding a forged X-Forwarded-For header. Starting with version 2025.9.1, an option (`trustProxy`) has been added in config file to prevent this from happening. However, it is initialized with an insecure default value before version 2025.12.0-alpha.2, making it still vulnerable if the configuration is not set correctly. This is patched in v2025.12.0-alpha.2 by flipping default value of `trustProxy` to `false`. Users of a trusted reverse proxy who are unsure if they manually overode this value should check their config for optimal behavior. Users are running Misskey with a trusted reverse proxy should not be affected by this vulnerability. From v2025.9.1 to v2025.11.1, workaround is available. Set `trustProxy: false` in config file.","state":0,"publishedAt":"2025-12-16T00:16:02.503+00:00","modifiedAt":"2026-10-14T13:10:00.187+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/misskey-dev/misskey/commit/5512898463fa8487b9e6488912f35102b91f25f7","https://github.com/misskey-dev/misskey/security/advisories/GHSA-wwrj-3hvj-prpm"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66482","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-307","CWE-1188"],"productCriteria":["cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:-:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta16:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta21:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta22:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta23:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta24:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta25:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta26:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta27:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta28:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta29:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta30:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta31:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta32:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta33:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta34:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta35:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta36:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta37:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta38:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta39:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta40:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta41:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta42:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:beta43:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc1:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc10:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc11:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc2:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc3:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc4:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc5:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc6:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc7:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc8:*:*:*:*:*:*","cpe:2.3:a:misskey:misskey:13.0.0:rc9:*:*:*:*:*:*"],"sourceDates":{"published":"2025-12-16T00:16:02.503","lastModified":"2026-10-14T13:10:00.187"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2025-66482","identifiers":["CVE-2025-66482"]},"retained":false,"historicalAffected":[]}],"coverage":[]}