CVE-2025-27149
Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
31/03/2025
Last modified:
27/09/2025
Description
Zulip server provides an open-source team chat that helps teams stay productive and focused. Prior to 10.0, the data export to organization administrators feature in Zulip leaks private data. The collection of user-agent types identifying specific integrations or HTTP libraries (E.g., ZulipGitlabWebhook, okhttp, or PycURL) that have been used to access any organization on the server was incorrectly included in all three export types, regardless of if they were used to access the exported organization or not. The "public data" and "with consent" exports metadata including the titles of some topics in private channels which the administrator otherwise did not have access to, and none of the users consented to exporting and metadata for which users were in a group DM together. This vulnerability is fixed in 10.0.
Impact
Base Score 4.0
4.60
Severity 4.0
MEDIUM
Base Score 3.x
2.70
Severity 3.x
LOW
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* | 2.1.0 (including) | 10.0 (excluding) |
To consult the complete list of CPE names with products and versions, see this page