Vulnerability Description
Zulip is an open-source team collaboration tool with topic-based threading. Zulip Server version 2.0.0 and above are vulnerable to insufficient access control with multi-use invitations. A Zulip Server deployment which hosts multiple organizations is vulnerable to an attack where an invitation created in one organization (potentially as a role with elevated permissions) can be used to join any other organization. This bypasses any restrictions on required domains on users' email addresses, may be used to gain access to organizations which are only accessible by invitation, and may be used to gain access with elevated privileges. This issue has been patched in release 4.10. There are no known workarounds for this issue. ### Patches _Has the problem been patched? What versions should users upgrade to?_ ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ ### References _Are there any links users can visit to find out more?_ ### For more information If you have any questions or comments about this advisory, you can discuss them on the [developer community Zulip server](https://zulip.com/developer-community/), or email the [Zulip security team](mailto:[email protected]).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zulip | Zulip Server | >= 2.0.0, < 4.10.0 |
Related Weaknesses (CWE)
References
- https://blog.zulip.com/2022/02/25/zulip-cloud-invitation-vulnerability/Vendor Advisory
- https://blog.zulip.com/2022/02/25/zulip-server-4-10-security-release/#cve-2022-2Vendor Advisory
- https://github.com/zulip/zulip/commit/88917019f03860609114082cdc0f31a561503f9ePatchThird Party Advisory
- https://github.com/zulip/zulip/security/advisories/GHSA-6xmj-2wcm-p2jcThird Party Advisory
- https://blog.zulip.com/2022/02/25/zulip-cloud-invitation-vulnerability/Vendor Advisory
- https://blog.zulip.com/2022/02/25/zulip-server-4-10-security-release/#cve-2022-2Vendor Advisory
- https://github.com/zulip/zulip/commit/88917019f03860609114082cdc0f31a561503f9ePatchThird Party Advisory
- https://github.com/zulip/zulip/security/advisories/GHSA-6xmj-2wcm-p2jcThird Party Advisory
FAQ
What is CVE-2022-21706?
CVE-2022-21706 is a vulnerability with a CVSS score of 7.2 (HIGH). Zulip is an open-source team collaboration tool with topic-based threading. Zulip Server version 2.0.0 and above are vulnerable to insufficient access control with multi-use invitations. A Zulip Serve...
How severe is CVE-2022-21706?
CVE-2022-21706 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-21706?
Check the references section above for vendor advisories and patch information. Affected products include: Zulip Zulip Server.