# CVE-2021-20851: Cross-site request forgery in Browser and Operating System Finder

> A CSRF vulnerability allows remote attackers to hijack administrator sessions in the Browser and Operating System Finder plugin.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **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:** 1 Dec 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-49f3-3ch6-4x47

## What is CVE-2021-20851?

CVE-2021-20851 is a high-severity vulnerability in Aftab Muni Browser and Operating System Finder, published on 1 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

Cross-site request forgery (CSRF) vulnerability in Browser and Operating System Finder versions prior to 1.2 allows a remote unauthenticated attacker to hijack the authentication of an administrator via unspecified vectors.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2021-20851?

It affects 1 product.


Products: Browser and Operating System Finder Project Browser and Operating System Finder.

## How do I fix CVE-2021-20851?

No fix has been published for CVE-2021-20851 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-20851 being exploited?

There is no known exploitation of CVE-2021-20851 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20851 and fix it if it is affected.

What it is: CVE-2021-20851 is a high-severity vulnerability in Aftab Muni Browser and Operating System Finder, published on 1 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-2021-20851 in the wild and no public exploit code.

Affected product: Aftab Muni Browser and Operating System Finder. 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-2021-20851/ (Markdown: https://insights.sbomify.com/CVE-2021-20851/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20851
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20851
- OSV: https://osv.dev/vulnerability/CVE-2021-20851

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-20851/
Summaries are generated and may contain mistakes; the official description above is the record.