Improper access control in Zulip Server - CVE-2022-36048
Published: August 25, 2022 / Updated: August 11, 2026
Vulnerability identifier: #VU141409
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-36048
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the image proxy when requesting external images. A remote user can cause requests to bypass the image proxy to disclose sensitive information.
The issue results in an IP address leak.
Affected software
Zulip Server
How to mitigate CVE-2022-36048
Install security update from vendor's website.
Zulip Server - update to 5.6