CVE-2021-3967 Improper Access Control in zulip/zulip
An attacker can bypass access controls in the Zulip chat platform to perform unauthorized actions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3967?
CVE-2021-3967 is a medium-severity missing authorization vulnerability in zulip/zulip, published on 26 Feb 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Improper Access Control in GitHub repository zulip/zulip prior to 4.10.
Weakness: CWE-284
Which versions are affected by CVE-2021-3967?
It affects 1 product.
Products include Zulip Zulip.
How do I fix CVE-2021-3967?
No fix has been published for CVE-2021-3967 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-3967 being exploited?
There is no known exploitation of CVE-2021-3967 in the wild and no public exploit code.
Other vulnerabilities in zulip/zulip
- CVE-2021-43799 RabbitMQ exposes ports with weak default secrets in Zulip Server
- CVE-2022-35962 Crafted link in Zulip message can cause disclosure of credentials
- CVE-2016-4427 Auth bypass in zulip
- CVE-2021-3866 Cross-site Scripting (XSS) - Stored in zulip/zulip
- CVE-2023-28623 Unauthorized user can register an account in specific configurations in Zulip
Sources
Also known as GHSA-2xp9-33rm-wcwv.