CVE-2025-47930
Zulip Server has access control bypass for restrictions on creation of specific channel types
Description
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.
INFO
Published Date :
May 16, 2025, 12:15 a.m.
Last Modified :
Aug. 27, 2025, 2:26 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Zulip to version 10.3 or later.
- Verify access controls for channel creation.
- Test channel privacy setting changes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-47930.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-47930 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-47930
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-47930 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-47930 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 27, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:* versions from (including) 10.0 up to (excluding) 10.3 Added Reference Type GitHub, Inc.: https://github.com/zulip/zulip/commit/d2ff4bda4c3efa30fc3ab1f151255cfdbf370f78 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/zulip/zulip/security/advisories/GHSA-rqg7-xfqg-v7q5 Types: Third Party Advisory Added Reference Type GitHub, Inc.: https://zulip.com/help/configure-who-can-create-channels Types: Product Added Reference Type GitHub, Inc.: https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-10-3 Types: Release Notes -
New CVE Received by [email protected]
May. 16, 2025
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-863 Added Reference https://github.com/zulip/zulip/commit/d2ff4bda4c3efa30fc3ab1f151255cfdbf370f78 Added Reference https://github.com/zulip/zulip/security/advisories/GHSA-rqg7-xfqg-v7q5 Added Reference https://zulip.com/help/configure-who-can-create-channels Added Reference https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-10-3