VULNERABILITY INTELLIGENCE

CVE-2021-30478

CVSS score4.3 MEDIUM
EPSS probability0.57%
CISA KEVNot currently listed
Published2021-04-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Description

An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the can_forge_sender permission (previously is_api_super_user) resulted in users with this permission being able to send messages appearing as if sent by a system bot, including to other organizations hosted by the same Zulip installation.

Weakness classification

  • nvd@nist.gov: CWE-269

Primary references