# CVE-2020-14502: Cross-site scripting in 1734-AENTR

> Remote unauthenticated attackers can inject malicious scripts into the web interface of the 1734-AENTR module to modify homepage string values.

- **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:** 24 Feb 2022
- **Updated:** 17 Apr 2025
- **Also known as:** GHSA-vj77-9g38-f2fm

## What is CVE-2020-14502?

CVE-2020-14502 is a medium-severity cross-site scripting vulnerability in Rockwell Automation 1734-AENTR, published on 24 Feb 2022. 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

The web interface of the 1734-AENTR communication module is vulnerable to stored XSS. A remote, unauthenticated attacker could store a malicious script within the web interface that, when executed, could modify some string values on the homepage of the web interface.

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

## Which versions are affected by CVE-2020-14502?

It affects 2 products.


Products: Rockwellautomation 1734-Aentr Point I\/O Dual Port Network Adaptor Series B Firmware, Rockwellautomation 1734-Aentr Point I\/O Dual Port Network Adaptor Series C Firmware.

## How do I fix CVE-2020-14502?

No fix has been published for CVE-2020-14502 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-14502 being exploited?

There is no known exploitation of CVE-2020-14502 in the wild and no public exploit code.

## Other vulnerabilities in Rockwell Automation 1734-AENTR

- [CVE-2020-14504](https://insights.sbomify.com/CVE-2020-14504/): Auth bypass in 1734-AENTR (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-14502 and fix it if it is affected.

What it is: CVE-2020-14502 is a medium-severity cross-site scripting vulnerability in Rockwell Automation 1734-AENTR, published on 24 Feb 2022. 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-2020-14502 in the wild and no public exploit code.

Affected product: Rockwell Automation 1734-AENTR. 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-2020-14502/ (Markdown: https://insights.sbomify.com/CVE-2020-14502/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-14502
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-14502
- OSV: https://osv.dev/vulnerability/CVE-2020-14502

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-14502/
Summaries are generated and may contain mistakes; the official description above is the record.