# CVE-2021-22941: Citrix ShareFile Improper Access Control

> An unauthenticated attacker can remotely compromise the Citrix ShareFile storage zones controller due to improper access control.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 25 Mar 2022 (CISA KEV), used in ransomware
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Sep 2021
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-83fg-h4qw-7574

## What is CVE-2021-22941?

CVE-2021-22941 is a critical authentication bypass vulnerability in Citrix ShareFile storage zones controller, published on 23 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper Access Control in Citrix ShareFile storage zones controller before 5.11.20 may allow an unauthenticated attacker to remotely compromise the storage zones controller.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2021-22941?

It affects 1 product.


Products: Citrix Sharefile Storagezones Controller.

## How do I fix CVE-2021-22941?

No fix has been published for CVE-2021-22941 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 15 Apr 2022.

## Is CVE-2021-22941 being exploited?

Yes. Attackers have exploited CVE-2021-22941 in the wild since at least 25 Mar 2022, including in ransomware campaigns.

Public exploit code:

- https://github.com/hoav18/CVE-2021-22941 (github_poc): https://github.com/hoav18/CVE-2021-22941
- Vulnerable environment for testing CVE-2021-22941 Nuclei template (github_poc): https://github.com/pratikjojode/citrix-cve-2021-22941-lab

## Other vulnerabilities in Citrix ShareFile storage zones controller

- [CVE-2021-22891](https://insights.sbomify.com/CVE-2021-22891/): Missing authorization in Citrix ShareFile Storage Zones Controller (critical 9.8)
- [CVE-2021-22932](https://insights.sbomify.com/CVE-2021-22932/): Weak cryptography in Citrix ShareFile Storage Zones Controller (high 7.5)
- [CVE-2020-7473](https://insights.sbomify.com/CVE-2020-7473/): Path traversal in n/a (high 7.5)
- [CVE-2020-8982](https://insights.sbomify.com/CVE-2020-8982/): Path traversal in n/a (high 7.5)
- [CVE-2020-8983](https://insights.sbomify.com/CVE-2020-8983/): Path traversal in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-22941 and fix it if it is affected.

What it is: CVE-2021-22941 is a critical authentication bypass vulnerability in Citrix ShareFile storage zones controller, published on 23 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2021-22941 in the wild since at least 25 Mar 2022, including in ransomware campaigns.

Affected product: Citrix ShareFile storage zones controller. 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-2021-22941/ (Markdown: https://insights.sbomify.com/CVE-2021-22941/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-22941
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-22941
- OSV: https://osv.dev/vulnerability/CVE-2021-22941

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-22941/
Summaries are generated and may contain mistakes; the official description above is the record.