CVE-2025-47930
mediumpriority · track · 21OT risk · elevatedEPSS 0.004 · 29 %ileEUUSEPSS · scored 2026-10-28
Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the "Who can create public channels" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or modifying the HTML, as we do mark the "private" radio button as disabled in such cases. Version 10.3 contains a patch.
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 · 1.3–5.3
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 (14)
External citations — patches, advisories, analysis.
- https://github.com/zulip/zulip/commit/d2ff4bda4c3efa30fc3ab1f151255cfdbf370f78cnnvd
- https://github.com/zulip/zulip/releasesPatchcnnvd
- https://github.com/zulip/zulip/security/advisories/GHSA-rqg7-xfqg-v7q5cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2025-47930cnnvd
- https://zulip.com/help/configure-who-can-create-channelscnnvd
- https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-10-3cnnvd
- https://github.com/zulip/zulip/commit/d2ff4bda4c3efa30fc3ab1f151255cfdbf370f78enisa_euvd
- https://github.com/zulip/zulip/security/advisories/GHSA-rqg7-xfqg-v7q5enisa_euvd
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