CVE-2021-30478 Privilege escalation in n/a
Users with specific permissions can forge messages appearing from system bots, potentially affecting other organizations on the same server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-30478?
CVE-2021-30478 is a medium-severity vulnerability in n/a, published on 14 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the can_forge_sender permission (previously is_api_super_user) resulted in users with this permission being able to send messages appearing as if sent by a system bot, including to other organizations hosted by the same Zulip installation.
Weakness: CWE-269
Which versions are affected by CVE-2021-30478?
It affects 1 product.
Products include Zulip Zulip Server.
How do I fix CVE-2021-30478?
No fix has been published for CVE-2021-30478 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-30478 being exploited?
There is no known exploitation of CVE-2021-30478 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-7f6g-27rf-r8f2.