# CVE-2020-20645: Cross-site scripting in n/a

> An XSS vulnerability in EyouCMS allows attackers to inject malicious scripts into the basic information area, potentially compromising user sessions.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 19 Aug 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-j97x-5g7g-g282

## What is CVE-2020-20645?

CVE-2020-20645 is a medium-severity cross-site scripting vulnerability in Eyoucms Eyoucms, published on 19 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Cross Site Scripting (XSS) vulnerability exists in EyouCMS1.3.6 in the basic_information area.

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

## Which versions are affected by CVE-2020-20645?

It affects 1 product.


Products: Eyoucms Eyoucms.

## How do I fix CVE-2020-20645?

No fix has been published for CVE-2020-20645 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-20645 being exploited?

There is no known exploitation of CVE-2020-20645 in the wild and no public exploit code.

## Other vulnerabilities in Eyoucms Eyoucms

- [CVE-2023-42286](https://insights.sbomify.com/CVE-2023-42286/): File upload in n/a (critical 9.8)
- [CVE-2022-26273](https://insights.sbomify.com/CVE-2022-26273/): Business logic in n/a (critical 9.8)
- [CVE-2022-26279](https://insights.sbomify.com/CVE-2022-26279/): Missing authorization in n/a (critical 9.8)
- [CVE-2020-24000](https://insights.sbomify.com/CVE-2020-24000/): SQL injection in n/a (critical 9.8)
- [CVE-2021-39497](https://insights.sbomify.com/CVE-2021-39497/): Server-side request forgery in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-20645 and fix it if it is affected.

What it is: CVE-2020-20645 is a medium-severity cross-site scripting vulnerability in Eyoucms Eyoucms, published on 19 Aug 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-20645 in the wild and no public exploit code.

Affected product: Eyoucms Eyoucms. 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-2020-20645/ (Markdown: https://insights.sbomify.com/CVE-2020-20645/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-20645
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-20645
- OSV: https://osv.dev/vulnerability/CVE-2020-20645

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-20645/
Summaries are generated and may contain mistakes; the official description above is the record.