# CVE-2020-2505: Sensitive information via generation of error messages vulnerability in QES

> Attackers can obtain sensitive information through error message generation in QNAP QES, requiring an upgrade to the latest build.

- **Severity:** Low 2.3 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Dec 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-5g2x-gm3x-pm24

## What is CVE-2020-2505?

CVE-2020-2505 is a low-severity vulnerability in QNAP Systems Inc. QES, published on 24 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

If exploited, this vulnerability could allow attackers to gain sensitive information via generation of error messages. QNAP has already fixed these issues in QES 2.1.1 Build 20201006 and later.

Weakness: CWE-755 (Improper Handling of Exceptional Conditions), CWE-209 (Generation of Error Message Containing Sensitive Information)

## Which versions are affected by CVE-2020-2505?

It affects 1 product.


Products: Qnap Qes.

## How do I fix CVE-2020-2505?

No fix has been published for CVE-2020-2505 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-2505 being exploited?

There is no known exploitation of CVE-2020-2505 in the wild and no public exploit code.

## Other vulnerabilities in QNAP Systems Inc. QES

- [CVE-2020-2503](https://insights.sbomify.com/CVE-2020-2503/): Stored cross-site scripting vulnerability in QES (critical 9.0)
- [CVE-2020-2499](https://insights.sbomify.com/CVE-2020-2499/): Hard-coded Password Vulnerability in QES (medium 6.3)
- [CVE-2020-2504](https://insights.sbomify.com/CVE-2020-2504/): Absolute path traversal vulnerability in QES (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-2505 and fix it if it is affected.

What it is: CVE-2020-2505 is a low-severity vulnerability in QNAP Systems Inc. QES, published on 24 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-2505 in the wild and no public exploit code.

Affected product: QNAP Systems Inc. QES. 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-2020-2505/ (Markdown: https://insights.sbomify.com/CVE-2020-2505/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-2505
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-2505
- OSV: https://osv.dev/vulnerability/CVE-2020-2505

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-2505/
Summaries are generated and may contain mistakes; the official description above is the record.