Vulnerability Details CVE-2025-66482
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 15.6%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2025-66482
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cpe:2.3:a:misskey:misskey:13.0.0
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cpe:2.3:a:misskey:misskey:13.1.0
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cpe:2.3:a:misskey:misskey:13.1.1
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cpe:2.3:a:misskey:misskey:13.1.2
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cpe:2.3:a:misskey:misskey:13.1.3
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cpe:2.3:a:misskey:misskey:13.1.4
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cpe:2.3:a:misskey:misskey:13.1.5
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cpe:2.3:a:misskey:misskey:13.1.6
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cpe:2.3:a:misskey:misskey:13.1.7
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cpe:2.3:a:misskey:misskey:13.1.8
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cpe:2.3:a:misskey:misskey:13.10.0
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cpe:2.3:a:misskey:misskey:13.10.1
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cpe:2.3:a:misskey:misskey:13.10.2
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cpe:2.3:a:misskey:misskey:13.10.3
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cpe:2.3:a:misskey:misskey:13.11.0
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cpe:2.3:a:misskey:misskey:13.11.1
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cpe:2.3:a:misskey:misskey:13.11.2
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cpe:2.3:a:misskey:misskey:13.11.3
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cpe:2.3:a:misskey:misskey:13.12.0
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cpe:2.3:a:misskey:misskey:13.12.1
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cpe:2.3:a:misskey:misskey:13.12.2
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cpe:2.3:a:misskey:misskey:13.13.0
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cpe:2.3:a:misskey:misskey:13.13.1
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cpe:2.3:a:misskey:misskey:13.13.2
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cpe:2.3:a:misskey:misskey:13.14.0
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cpe:2.3:a:misskey:misskey:13.14.1
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cpe:2.3:a:misskey:misskey:13.14.2
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cpe:2.3:a:misskey:misskey:13.2.0
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cpe:2.3:a:misskey:misskey:13.2.1
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cpe:2.3:a:misskey:misskey:13.2.2
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cpe:2.3:a:misskey:misskey:13.2.3
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cpe:2.3:a:misskey:misskey:13.2.4
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cpe:2.3:a:misskey:misskey:13.2.5
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cpe:2.3:a:misskey:misskey:13.2.6
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cpe:2.3:a:misskey:misskey:13.3.0
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cpe:2.3:a:misskey:misskey:13.3.1
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cpe:2.3:a:misskey:misskey:13.3.2
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cpe:2.3:a:misskey:misskey:13.3.3
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cpe:2.3:a:misskey:misskey:13.3.4
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cpe:2.3:a:misskey:misskey:13.4.0
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cpe:2.3:a:misskey:misskey:13.5.0
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cpe:2.3:a:misskey:misskey:13.5.1
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cpe:2.3:a:misskey:misskey:13.5.2
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cpe:2.3:a:misskey:misskey:13.5.3
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cpe:2.3:a:misskey:misskey:13.5.4
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cpe:2.3:a:misskey:misskey:13.5.5
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cpe:2.3:a:misskey:misskey:13.5.6
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cpe:2.3:a:misskey:misskey:13.6.0
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cpe:2.3:a:misskey:misskey:13.6.1
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cpe:2.3:a:misskey:misskey:13.7.0
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cpe:2.3:a:misskey:misskey:13.7.1
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cpe:2.3:a:misskey:misskey:13.7.2
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cpe:2.3:a:misskey:misskey:13.7.3
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cpe:2.3:a:misskey:misskey:13.7.4
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cpe:2.3:a:misskey:misskey:13.7.5
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cpe:2.3:a:misskey:misskey:13.8.0
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cpe:2.3:a:misskey:misskey:13.8.1
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cpe:2.3:a:misskey:misskey:13.9.0
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cpe:2.3:a:misskey:misskey:13.9.1
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cpe:2.3:a:misskey:misskey:13.9.2
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cpe:2.3:a:misskey:misskey:2023.10.0
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cpe:2.3:a:misskey:misskey:2023.10.1
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cpe:2.3:a:misskey:misskey:2023.10.2
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cpe:2.3:a:misskey:misskey:2023.11.0
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cpe:2.3:a:misskey:misskey:2023.11.1
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cpe:2.3:a:misskey:misskey:2023.12.0
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cpe:2.3:a:misskey:misskey:2023.12.1
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cpe:2.3:a:misskey:misskey:2023.12.2
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cpe:2.3:a:misskey:misskey:2023.9.0
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cpe:2.3:a:misskey:misskey:2023.9.1
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cpe:2.3:a:misskey:misskey:2023.9.2
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cpe:2.3:a:misskey:misskey:2023.9.3
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cpe:2.3:a:misskey:misskey:2024.10.0
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cpe:2.3:a:misskey:misskey:2024.10.1
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cpe:2.3:a:misskey:misskey:2024.10.2
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cpe:2.3:a:misskey:misskey:2024.11.0
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cpe:2.3:a:misskey:misskey:2024.11.1
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cpe:2.3:a:misskey:misskey:2024.2.0
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cpe:2.3:a:misskey:misskey:2024.3.0
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cpe:2.3:a:misskey:misskey:2024.3.1
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cpe:2.3:a:misskey:misskey:2024.5.0
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cpe:2.3:a:misskey:misskey:2024.7.0
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cpe:2.3:a:misskey:misskey:2024.8.0
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cpe:2.3:a:misskey:misskey:2024.9.0
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cpe:2.3:a:misskey:misskey:2025.1.0
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cpe:2.3:a:misskey:misskey:2025.10.0
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cpe:2.3:a:misskey:misskey:2025.10.1
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cpe:2.3:a:misskey:misskey:2025.10.2
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cpe:2.3:a:misskey:misskey:2025.11.0
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cpe:2.3:a:misskey:misskey:2025.11.1
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cpe:2.3:a:misskey:misskey:2025.11.2
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cpe:2.3:a:misskey:misskey:2025.2.0
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cpe:2.3:a:misskey:misskey:2025.2.1
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cpe:2.3:a:misskey:misskey:2025.3.0
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cpe:2.3:a:misskey:misskey:2025.3.1
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cpe:2.3:a:misskey:misskey:2025.3.2
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cpe:2.3:a:misskey:misskey:2025.4.0
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cpe:2.3:a:misskey:misskey:2025.4.1
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cpe:2.3:a:misskey:misskey:2025.5.0
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cpe:2.3:a:misskey:misskey:2025.5.1
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cpe:2.3:a:misskey:misskey:2025.6.0
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cpe:2.3:a:misskey:misskey:2025.6.1
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cpe:2.3:a:misskey:misskey:2025.6.2
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cpe:2.3:a:misskey:misskey:2025.6.3
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cpe:2.3:a:misskey:misskey:2025.6.4
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cpe:2.3:a:misskey:misskey:2025.7.0
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cpe:2.3:a:misskey:misskey:2025.8.0
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cpe:2.3:a:misskey:misskey:2025.9.0
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cpe:2.3:a:misskey:misskey:2025.9.1