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CVE-2025-66482Published

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…

Exact source revision recorded 25 Oct 2026 03:17:36 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

nvd · CVE-2025-66482

Published

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.

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.

Source analysis status: Analyzed

Weakness classifications: CWE-307 · CWE-1188

Original publisher date fields

published: 2025-12-16T00:16:02.503

lastModified: 2026-10-14T13:10:00.187

37 source CPE criteria · context only
  • 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:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published
16 Dec 2025 00:16:02 UTC
Source modified
14 Oct 2026 13:10:00 UTC
Observed here
25 Oct 2026 03:17:36 UTC
Source terms
NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 6.9 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

CVSS 3.1 · [email protected] · Primary · 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 10 Nov 03:40 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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