VULNERABILITY INTELLIGENCE

CVE-2021-30479

CVSS score5.3 MEDIUM
EPSS probability0.86%
CISA KEVNot currently listed
Published2021-04-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Description

An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the all_public_streams API feature resulted in guest users being able to receive message traffic to public streams that should have been only accessible to members of the organization.

Weakness classification

  • CWE-269: Improper Privilege Management

Primary references