CVE-2021-30487
LOWCVSS 2.7/10EPSS 0.65%
Last modified
CVE-2021-30487 is a low-severity vulnerability rated 2.7/10 on the CVSS scale. 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.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zulip | Zulip Server | >= 3.0, < 3.4 |
References
- https://blog.zulip.com/2021/04/14/zulip-server-3-4/Release Notes, Vendor Advisory
- https://blog.zulip.com/2021/04/14/zulip-server-3-4/Release Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-30487?
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.
How severe is CVE-2021-30487?
CVE-2021-30487 has a CVSS score of 2.7/10 (LOW severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.
How do I fix CVE-2021-30487?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-30487?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST