CVE-2024-56136
mediumpriority · track · 21EPSS 0.006 · 48 %ileEUUSEPSS · scored 2026-10-28
Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.7–6.9
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://github.com/zulip/zulip/commit/c6334a765b1e6d71760e4a3b32ae5b8367f2ed4dcnnvd
- https://github.com/zulip/zulip/releases/tag/9.4Patchcnnvd
- https://github.com/zulip/zulip/security/advisories/GHSA-5xg8-xhfj-4hm6cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2024-56136cnnvd
- https://github.com/zulip/zulip/commit/c6334a765b1e6d71760e4a3b32ae5b8367f2ed4denisa_euvd
- https://github.com/zulip/zulip/security/advisories/GHSA-5xg8-xhfj-4hm6enisa_euvd
- https://github.com/zulip/zulip/commit/c6334a765b1e6d71760e4a3b32ae5b8367f2ed4dPatchnvd
- https://github.com/zulip/zulip/security/advisories/GHSA-5xg8-xhfj-4hm6Third Party Advisorynvd
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