CVE-2022-21706
What it is
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]).
At a glance
- Exploitability
- Can be exploited over the network without logging in. Limited direct impact.
- Exploit odds
- 1.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.2% in the next 30 days (EPSS).
- Severity: 7.2 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.2% · EPSS, next 30 days
- Weakness
- CWE-284 · Improper access control
- Record status
- Modified
Affected
- Zulip Server < 4.10.0
Attack profile CVSS 3.1 · 7.2
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2022-21706.md and follow it. Check whether this project is affected by CVE-2022-21706. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://blog.zulip.com/2022/02/25/zulip-cloud-invitation-vulnerability/
- https://blog.zulip.com/2022/02/25/zulip-server-4-10-security-release/#cve-2022-21706
- https://github.com/zulip/zulip/commit/88917019f03860609114082cdc0f31a561503f9e
- https://github.com/zulip/zulip/security/advisories/GHSA-6xmj-2wcm-p2jc
- https://blog.zulip.com/2022/02/25/zulip-cloud-invitation-vulnerability/
- https://blog.zulip.com/2022/02/25/zulip-server-4-10-security-release/#cve-2022-21706
- https://github.com/zulip/zulip/commit/88917019f03860609114082cdc0f31a561503f9e
- https://github.com/zulip/zulip/security/advisories/GHSA-6xmj-2wcm-p2jc
References
- https://blog.zulip.com/2022/02/25/zulip-cloud-invitation-vulnerability/
- https://blog.zulip.com/2022/02/25/zulip-server-4-10-security-release/#cve-2022-21706
- https://github.com/zulip/zulip/commit/88917019f03860609114082cdc0f31a561503f9e
- https://github.com/zulip/zulip/security/advisories/GHSA-6xmj-2wcm-p2jc
- https://blog.zulip.com/2022/02/25/zulip-cloud-invitation-vulnerability/
- https://blog.zulip.com/2022/02/25/zulip-server-4-10-security-release/#cve-2022-21706
- https://github.com/zulip/zulip/commit/88917019f03860609114082cdc0f31a561503f9e
- https://github.com/zulip/zulip/security/advisories/GHSA-6xmj-2wcm-p2jc