# CVE-2020-5540: Cross-site scripting in CyberMail

> Remote attackers can inject arbitrary scripts via crafted URLs in CyberMail, potentially leading to session hijacking or malicious actions.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **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:** 25 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f7cr-gfx3-646g

## What is CVE-2020-5540?

CVE-2020-5540 is a medium-severity cross-site scripting vulnerability in CyberSolutions Inc. CyberMail, published on 25 Aug 2020. 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 scripting vulnerability in CyberMail Ver.6.x and Ver.7.x allows remote attackers to inject arbitrary script or HTML via a specially crafted URL.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2020-5540?

It affects 1 product.


Products: Cybersolutions Cybermail.

## How do I fix CVE-2020-5540?

No fix has been published for CVE-2020-5540 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5540 being exploited?

There is no known exploitation of CVE-2020-5540 in the wild and no public exploit code.

## Other vulnerabilities in CyberSolutions Inc. CyberMail

- [CVE-2020-5541](https://insights.sbomify.com/CVE-2020-5541/): Open redirect in CyberMail (medium 6.1)
- [CVE-2020-11734](https://insights.sbomify.com/CVE-2020-11734/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5540 and fix it if it is affected.

What it is: CVE-2020-5540 is a medium-severity cross-site scripting vulnerability in CyberSolutions Inc. CyberMail, published on 25 Aug 2020. 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-2020-5540 in the wild and no public exploit code.

Affected product: CyberSolutions Inc. CyberMail. 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-2020-5540/ (Markdown: https://insights.sbomify.com/CVE-2020-5540/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5540
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5540
- OSV: https://osv.dev/vulnerability/CVE-2020-5540

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5540/
Summaries are generated and may contain mistakes; the official description above is the record.