# CVE-2021-34425: Server Side Request Forgery in Zoom Client for Meetings chat

> Attackers can trick users into sending arbitrary HTTP GET requests via chat link previews, potentially accessing internal resources.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Dec 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-8737-w627-mrv7

## What is CVE-2021-34425?

CVE-2021-34425 is a medium-severity server-side request forgery vulnerability in Zoom Client for Meetings for Android, published on 14 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The Zoom Client for Meetings before version 5.7.3 (for Android, iOS, Linux, macOS, and Windows) contain a server side request forgery vulnerability in the chat\'s "link preview" functionality. In versions prior to 5.7.3, if a user were to enable the chat\'s "link preview" feature, a malicious actor could trick the user into potentially sending arbitrary HTTP GET requests to URLs that the actor cannot reach directly.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2021-34425?

It affects 1 product.


Products: Zoom Meetings.

## How do I fix CVE-2021-34425?

No fix has been published for CVE-2021-34425 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-34425 being exploited?

There is no known exploitation of CVE-2021-34425 in the wild and no public exploit code.

## Other vulnerabilities in Zoom Client for Meetings for Android

- [CVE-2021-33907](https://insights.sbomify.com/CVE-2021-33907/): Code injection in Zoom Client for Meetings for Windows (critical 9.8)
- [CVE-2022-28768](https://insights.sbomify.com/CVE-2022-28768/): Local Privilege Escalation in Zoom Client Installer for macOS (high 8.8)
- [CVE-2022-28763](https://insights.sbomify.com/CVE-2022-28763/): Improper URL parsing in Zoom Clients (high 8.8)
- [CVE-2022-28757](https://insights.sbomify.com/CVE-2022-28757/): Local Privilege Escalation in Auto Updater for Zoom Client for Meetings for macOS (high 8.8)
- [CVE-2022-28751](https://insights.sbomify.com/CVE-2022-28751/): Local Privilege Escalation in Zoom Client for Meetings for MacOS (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-34425 and fix it if it is affected.

What it is: CVE-2021-34425 is a medium-severity server-side request forgery vulnerability in Zoom Client for Meetings for Android, published on 14 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-34425 in the wild and no public exploit code.

Affected product: Zoom Client for Meetings for Android. 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-2021-34425/ (Markdown: https://insights.sbomify.com/CVE-2021-34425/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-34425
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-34425
- OSV: https://osv.dev/vulnerability/CVE-2021-34425

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-34425/
Summaries are generated and may contain mistakes; the official description above is the record.