# CVE-2021-27505: mySCADA myPRO Exposure of Information Through Directory Listing

> An attacker can access sensitive directory listing information in mySCADA myPRO due to unrestricted read access, potentially exposing internal data.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 May 2022
- **Updated:** 16 Apr 2025
- **Also known as:** GHSA-5crv-26fx-6c29

## What is CVE-2021-27505?

CVE-2021-27505 is a high-severity vulnerability in mySCADA myPRO, published on 13 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

mySCADA myPRO versions prior to 8.20.0 does not restrict unauthorized read access to sensitive directory listing information.

Weakness: CWE-548 (Exposure of Information Through Directory Listing)

## Which versions are affected by CVE-2021-27505?

It affects 1 product.


Products: Myscada Mypro.

## How do I fix CVE-2021-27505?

No fix has been published for CVE-2021-27505 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27505 being exploited?

There is no known exploitation of CVE-2021-27505 in the wild and no public exploit code.

## Other vulnerabilities in mySCADA myPRO

- [CVE-2025-24865](https://insights.sbomify.com/CVE-2025-24865/): mySCADA myPRO Manager Missing Authentication for Critical Function (critical 10.0)
- [CVE-2021-22657](https://insights.sbomify.com/CVE-2021-22657/): mySCADA myPRO (critical 10.0)
- [CVE-2021-23198](https://insights.sbomify.com/CVE-2021-23198/): mySCADA myPRO (critical 10.0)
- [CVE-2021-43981](https://insights.sbomify.com/CVE-2021-43981/): mySCADA myPRO (critical 10.0)
- [CVE-2021-43984](https://insights.sbomify.com/CVE-2021-43984/): mySCADA myPRO (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27505 and fix it if it is affected.

What it is: CVE-2021-27505 is a high-severity vulnerability in mySCADA myPRO, published on 13 May 2022. 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-2021-27505 in the wild and no public exploit code.

Affected product: mySCADA myPRO. 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-2021-27505/ (Markdown: https://insights.sbomify.com/CVE-2021-27505/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27505
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27505
- OSV: https://osv.dev/vulnerability/CVE-2021-27505

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27505/
Summaries are generated and may contain mistakes; the official description above is the record.