Main Vulnerability Database Vulnerabilities #VU126821

Incorrect authorization in Zulip Server - CVE-2026-25741

Published: April 22, 2026

Vulnerability identifier: #VU126821

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2026-25741

CWE-ID: CWE-863

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Zulip

Affected software:
Zulip Server

Detailed vulnerability description

The vulnerability allows a remote attacker to bypass authorization process.

The vulnerability exists due to improper billing-specific authorization check. A remote user can change the organization’s payment method.

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.