# CVE-2025-47930: Zulip Server has access control bypass for restrictions on creation of specific channel types

> Attackers can bypass channel creation restrictions by creating private channels and changing their privacy settings to public.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 May 2025
- **Updated:** 16 May 2025
- **Also known as:** GHSA-rqg7-xfqg-v7q5

## What is CVE-2025-47930?

CVE-2025-47930 is a medium-severity missing authorization vulnerability in zulip, published on 15 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2025-47930?

It affects 1 product.


Products: Zulip Zulip.

## How do I fix CVE-2025-47930?

No fix has been published for CVE-2025-47930 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-47930 being exploited?

There is no known exploitation of CVE-2025-47930 in the wild and no public exploit code.

## Other vulnerabilities in zulip

- [CVE-2021-43799](https://insights.sbomify.com/CVE-2021-43799/): RabbitMQ exposes ports with weak default secrets in Zulip Server (high 8.6)
- [CVE-2022-35962](https://insights.sbomify.com/CVE-2022-35962/): Crafted link in Zulip message can cause disclosure of credentials (high 8.0)
- [CVE-2016-4427](https://insights.sbomify.com/CVE-2016-4427/): Auth bypass in zulip (high 7.5)
- [CVE-2021-3866](https://insights.sbomify.com/CVE-2021-3866/): Cross-site Scripting (XSS) - Stored in zulip/zulip (medium 6.8)
- [CVE-2023-28623](https://insights.sbomify.com/CVE-2023-28623/): Unauthorized user can register an account in specific configurations in Zulip (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-47930 and fix it if it is affected.

What it is: CVE-2025-47930 is a medium-severity missing authorization vulnerability in zulip, published on 15 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-47930 in the wild and no public exploit code.

Affected product: zulip. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-47930/ (Markdown: https://insights.sbomify.com/CVE-2025-47930/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-47930
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-47930
- OSV: https://osv.dev/vulnerability/CVE-2025-47930

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-47930/
Summaries are generated and may contain mistakes; the official description above is the record.