Zulip is an open-source team collaboration tool. Versions 2.1.0 through and including 5.2 are vulnerable to a logic error. A stream configured as private with protected history, where new subscribers should not be allowed to see messages sent before they were subscribed, when edited causes the server to incorrectly send an API event that includes the edited message to all of the stream’s current subscribers. This API event is ignored by official clients, but can be observed by using a modified client or the browser’s developer tools. This bug will be fixed in Zulip Server 5.3. There are no known workarounds.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:NZulip
APPZulip2.1.0 – 5.3 (bez)
Related vulnerabilities
Zulip is an open source team chat and Zulip Mobile is an app for iOS and Andriod users. In Zulip Mobile throug...
In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.
Improper Access Control in GitHub repository zulip/zulip prior to 4.10.
Zulip is an open-source team collaboration tool. Zulip Server installs RabbitMQ for internal message passing. ...
Zulip is an open-source team collaboration tool. Prior to version 11.6, Zulip is an open-source team collabora...