Vulnerability identifier: #VU65765
Vulnerability risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-285
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Zulip Server
Web applications /
Other software
Vendor: Zulip
Description
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to an incorrect authorization check. A remote user can use a specially crafted API call and gain elevated privileges on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Zulip Server: 5.0 - 5.4
External links
http://github.com/zulip/zulip/releases/tag/5.5
http://github.com/zulip/zulip/commit/751b2a03e565e9eb02ffe923b7c24ac73d604034
http://github.com/zulip/zulip/security/advisories/GHSA-c3cp-ggg5-9xw5
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.