CVE-2025-24973CRITICAL 9.3EPSS p7.3%

CVE-2025-24973CVE-2025-24973

Description

Concorde, formerly know as Nexkey, is a fork of the federated microblogging platform Misskey. Prior to version 12.25Q1.1, due to an improper implementation of the logout process, authentication credentials remain in cookies even after a user has explicitly logged out, which may allow an attacker to steal authentication tokens. This could have devastating consequences if a user with admin privileges is (or was) using a shared device. Users who have logged in on a shared device should go to Settings > Security and regenerate their login tokens. Version 12.25Q1.1 fixes the issue. As a workaround, clear cookies and site data in the browser after logging out.

Scoring

CVSS 3.19.3 (CRITICAL)
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS0.18% probability of exploitation · percentile 7.3% · 2026-06-19T12:03:05Z
Published2025-02-11
Last modified2026-04-15

Underlying weaknesses· 1

CWE-613

References

  1. https://github.com/nexryai/concorde/commit/1f6ac9b289906083b132e4f9667a31a60ef83e4e
  2. https://github.com/nexryai/concorde/security/advisories/GHSA-2369-p2wh-7cc2

1

TypeTargetConfidenceTier
WeaknessInsufficient Session Expirationcwe-6130%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.