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I. Basic Information for CVE-2021-21396
Vulnerability Information

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Vulnerability Title
Bulk list client endpoint exposes too much metadata about a client
Source: NVD (National Vulnerability Database)
Vulnerability Description
wire-server is an open-source back end for Wire, a secure collaboration platform. In wire-server from version 2021-02-16 and before version 2021-03-02, the client metadata of all users was exposed in the `GET /users/list-clients` endpoint. The endpoint could be used by any logged in user who could request client details of any other user (no connection required) as far as they can find their User ID. The exposed metadata included id, class, type, location, time, and cookie. A user on a Wire backend could use this endpoint to find registration time and location for each device for a given list of users. As a workaround, remove `/list-clients` from nginx config. This has been fixed in version 2021-03-02.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
wire-server 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wire是个人开发者的一款聊天软件。该软件支持 Web、WindowsiOS、Android、OS X 平台,有群组功能,可以语音通话,发送照片以及其独创性的打招呼方式 PING。 wire-server 存在信息泄露漏洞,该漏洞源于所有用户的客户端元数据都暴露在GET /users/list-clients。
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)
Affected Products
VendorProductAffected VersionsCPESubscribe
wireappwire-server >= 2021-02-16, < 2021-03-02 -
II. Public POCs for CVE-2021-21396
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III. Intelligence Information for CVE-2021-21396
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IV. Related Vulnerabilities
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