Cross Site Scripting in Wire Webapp

Summary

wire-webapp is the web application interface for the wire messaging service. Insufficient escaping in markdown “code highlighting” in the wire-webapp resulted in the possibility of injecting and executing arbitrary HTML code and thus also JavaScript. If a user receives and views such a malicious message, arbitrary code is injected and executed in the context of the victim. This allows the attacker to fully control the user account. Wire-desktop clients that are connected to a vulnerable wire-webapp version are also vulnerable to this attack. The issue has been fixed in wire-webapp 2022-03-30-production.0 and is already deployed on all Wire managed services. On-premise instances of wire-webapp need to be updated to docker tag 2022-03-30-production.0-v0.29.2-0-d144552 or wire-server 2022-03-30 (chart/4.8.0), so that their applications are no longer affected. There are no known workarounds for this issue. ### Patches * The issue has been fixed in wire-webapp 2022-03-30-production.0 and is already deployed on all Wire managed services. * On-premise instances of wire-webapp need to be updated to docker tag 2022-03-30-production.0-v0.29.2-0-d144552 or wire-server 2022-03-30 (chart/4.8.0), so that their applications are no longer affected. ### Workarounds * No workarounds known ### For more information If you have any questions or comments about this advisory feel free to email us at vulnerability-report@wire.com ### Credits We thank Posix for reporting this vulnerability

Timeline

1. Apr 20, 2022, 5:55 PM UTCCVE published
2. Apr 23, 2025, 3:54 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Apr 23, 2025, 6:33 PM UTCRecord last updated

Affected versions

• wireapp wire-webapp

  fixed in 2022-03-30-production.0

References 3