# CVE-2021-27402: Path traversal in n/a

> Unauthenticated attackers can view and modify user data in Mitel MiCollab via directory traversal in the SAS Admin portal.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Aug 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-q747-vr2x-33cp

## What is CVE-2021-27402?

CVE-2021-27402 is a medium-severity path traversal vulnerability in n/a, published on 13 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The SAS Admin portal of Mitel MiCollab before 9.2 FP2 could allow an unauthenticated attacker to access (view and modify) user data by injecting arbitrary directory paths due to improper URL validation, aka Directory Traversal.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-27402?

It affects 1 product.


Products: Mitel Micollab.

## How do I fix CVE-2021-27402?

No fix has been published for CVE-2021-27402 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27402 being exploited?

There is no known exploitation of CVE-2021-27402 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-26143](https://insights.sbomify.com/CVE-2022-26143/): MiCollab, MiVoice Business Express Access Control (critical 9.8, exploited in the wild)
- [CVE-2024-41713](https://insights.sbomify.com/CVE-2024-41713/): Mitel MiCollab Path Traversal (critical 9.1, exploited in the wild)
- [CVE-2024-55550](https://insights.sbomify.com/CVE-2024-55550/): Mitel MiCollab Path Traversal (medium 4.4, exploited in the wild)
- [CVE-2024-35285](https://insights.sbomify.com/CVE-2024-35285/): Command injection in n/a (critical 9.8)
- [CVE-2024-35286](https://insights.sbomify.com/CVE-2024-35286/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27402 and fix it if it is affected.

What it is: CVE-2021-27402 is a medium-severity path traversal vulnerability in n/a, published on 13 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27402 in the wild and no public exploit code.

Affected product: n/a. 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-2021-27402/ (Markdown: https://insights.sbomify.com/CVE-2021-27402/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27402
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27402
- OSV: https://osv.dev/vulnerability/CVE-2021-27402

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27402/
Summaries are generated and may contain mistakes; the official description above is the record.