# CVE-2022-24751: Race condition in Zulip

> A race condition in Zulip allows deactivated users to retain access, requiring an upgrade to fixed versions.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A: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:** 16 Mar 2022
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-6v98-m5x5-phqj

## What is CVE-2022-24751?

CVE-2022-24751 is a medium-severity vulnerability in zulip, published on 16 Mar 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Zulip is an open source group chat application. Starting with version 4.0 and prior to version 4.11, Zulip is vulnerable to a race condition during account deactivation, where a simultaneous access by the user being deactivated may, in rare cases, allow continued access by the deactivated user. A patch is available in version 4.11 on the 4.x branch and version 5.0-rc1 on the 5.x branch. Upgrading to a fixed version will, as a side effect, deactivate any cached sessions that may have been leaked through this bug. There are currently no known workarounds.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2022-24751?

It affects 1 product.


Products: Zulip Zulip.

## How do I fix CVE-2022-24751?

No fix has been published for CVE-2022-24751 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-24751 being exploited?

There is no known exploitation of CVE-2022-24751 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-2022-24751 and fix it if it is affected.

What it is: CVE-2022-24751 is a medium-severity vulnerability in zulip, published on 16 Mar 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-24751 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-2022-24751/ (Markdown: https://insights.sbomify.com/CVE-2022-24751/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-24751
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-24751
- OSV: https://osv.dev/vulnerability/CVE-2022-24751

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-24751/
Summaries are generated and may contain mistakes; the official description above is the record.