CVE-2021-21396: medium-severity vulnerability in wireapp wire-server
Bulk list client endpoint exposes too much metadata about a client
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 1.2%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected products
wireapp · wire-serverRelated CVEs — wireapp wire-server
In the same product, most dangerous first.
CVE-2021-41119MEDIUMDoS vulnerabiliity in wire-server json parserEPSS 1.4%CVE-2021-41100HIGHAccount takeover when having only access to a user's short lived token in wire-serverEPSS 0.9%CVE-2023-22737MEDIUMwire-server vulnerable to unauthorized removal of Bots from ConversationsEPSS 0.8%CVE-2022-31122CRITICALWire-server vulnerable to Token Recipient Confusion resulting in account impersonation, deletion or malicious account creationEPSS 0.7%CVE-2021-41101MEDIUMCORS `Access-Control-Allow-Origin` settings are too lenientEPSS 0.7%CVE-2022-23610CRITICALImproper Verification of Cryptographic Signature in wire-serverEPSS 0.7%