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CVE-2025-24973— Concorde not removing authentication tokens after logging out

Quick assessment

Affected
nexryai concorde
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Concorde（Nexkey）是nexryai个人开发者的一个应用程序。 Concorde 12.25Q1.1版本之前存在代码问题漏洞，该漏洞源于注销过程实施不当，身份验证凭据仍会保留在cookie中，可能允许攻击者窃取身份验证令牌。

CVSS 9.4 · Critical EPSS 0.19% · P8
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I. Basic Information for CVE-2025-24973

Vulnerability Information
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Vulnerability Title
Concorde not removing authentication tokens after logging out
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
Source: CVE Program / CVE List V5
Vulnerability Title
Concorde 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Concorde（Nexkey）是nexryai个人开发者的一个应用程序。 Concorde 12.25Q1.1版本之前存在代码问题漏洞，该漏洞源于注销过程实施不当，身份验证凭据仍会保留在cookie中，可能允许攻击者窃取身份验证令牌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
nexryai concorde < 12.25Q1.1 -

II. Public POCs for CVE-2025-24973

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 5839 chars
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III. Intelligence Information for CVE-2025-24973

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Patches & Fixes for CVE-2025-24973 (1)

Vendor Advisories for CVE-2025-24973 (1)

IV. Related Vulnerabilities

Same product: concorde
Same vendor: nexryai
Same weakness: CWE-613

V. Comments for CVE-2025-24973

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