# CVE-2022-31134: Zulip Server public data export contains attachments that are non-public

> Administrators can access private message attachments via public data exports, violating privacy expectations in multi-tenant deployments.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Jul 2022
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-58pm-88xp-7x9m

## What is CVE-2022-31134?

CVE-2022-31134 is a medium-severity vulnerability in zulip, published on 12 Jul 2022. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Zulip is an open-source team collaboration tool. Zulip Server versions 2.1.0 above have a user interface tool, accessible only to server owners and server administrators, which provides a way to download a "public data" export. While this export is only accessible to administrators, in many configurations server administrators are not expected to have access to private messages and private streams. However, the "public data" export which administrators could generate contained the attachment contents for all attachments, even those from private messages and streams. Zulip Server version 5.4 contains a patch for this issue.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2022-31134?

It affects 1 product.


Products: Zulip Zulip Server.

## How do I fix CVE-2022-31134?

No fix has been published for CVE-2022-31134 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-31134 being exploited?

There is no known exploitation of CVE-2022-31134 in the wild and no public exploit code.

## Other vulnerabilities in zulip

- [CVE-2019-18933](https://insights.sbomify.com/CVE-2019-18933/): Information disclosure in n/a (critical 9.8)
- [CVE-2020-15070](https://insights.sbomify.com/CVE-2020-15070/): Code injection in n/a (high 8.8)
- [CVE-2017-0910](https://insights.sbomify.com/CVE-2017-0910/): Missing authorization in Zulip Server (high 8.8)
- [CVE-2025-31478](https://insights.sbomify.com/CVE-2025-31478/): Zulip Authentication Backend Configuration Bypass (high 8.2)
- [CVE-2023-33186](https://insights.sbomify.com/CVE-2023-33186/): Cross-site scripting vulnerability in Zulip Server development branch via topic tooltip (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-31134 and fix it if it is affected.

What it is: CVE-2022-31134 is a medium-severity vulnerability in zulip, published on 12 Jul 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-31134 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-2022-31134/ (Markdown: https://insights.sbomify.com/CVE-2022-31134/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-31134
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-31134
- OSV: https://osv.dev/vulnerability/CVE-2022-31134

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-31134/
Summaries are generated and may contain mistakes; the official description above is the record.