Auth bypass in Zulip

CVE-2025-47930

Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the "Who can create public channels" access control mechanism can be circumvented by creating a private or web-public channel, and then chan…

Vulnerability class: Broken Access Control

EPSS: 0.003 (20.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

  • Zulip — versions >= 10.0, < 10.3

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-47930?
CVE-2025-47930 is a medium-severity vulnerability in Zulip, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2025-05-16.
How severe is CVE-2025-47930?
Medium severity. CVSS v3 base score is 5.3 out of 10.