CVE-2023-32678: Zulip Server

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.

Affected products

• Zulip Zulip Server: before 7.3 (fixed in 7.3)

Published 2023-08-25. Last modified 2026-06-17.