AUGUST 4, 2026
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Case File

CVE-2021-30478

MEDIUM · CVSS 4.3 EPSS 0.57%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-04-15 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.3. See the original NVD description below for full technical details.

CVE
CVE-2021-30478
Severity
MEDIUM
CVSS
4.3
EPSS
0.57%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)