CVE-2021-30487 Missing authorization in n/a
Organization administrators can move messages to streams in other organizations on the same Zulip installation due to missing authorization checks.
- 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-2021-30487?
CVE-2021-30487 is a low-severity missing authorization vulnerability in n/a, published on 14 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
In the topic moving API in Zulip Server 3.x before 3.4, organization administrators were able to move messages to streams in other organizations hosted by the same Zulip installation.
Which versions are affected by CVE-2021-30487?
It affects 1 product.
Products include Zulip Zulip Server.
How do I fix CVE-2021-30487?
No fix has been published for CVE-2021-30487 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-2021-30487 being exploited?
There is no known exploitation of CVE-2021-30487 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2019-18933 Information disclosure in n/a
- CVE-2020-15070 Code injection in n/a
- CVE-2017-0910 Missing authorization in Zulip Server
- CVE-2025-31478 Zulip Authentication Backend Configuration Bypass
- CVE-2023-33186 Cross-site scripting vulnerability in Zulip Server development branch via topic tooltip
Sources
Also known as GHSA-2c8p-8v35-g4g6.