# CVE-2024-6528: Cross-site scripting in Modicon Controllers M241 / M251

> Attackers can inject malicious JavaScript into Modicon PLC web interfaces, allowing arbitrary code execution in victim browsers.

- **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:** 11 Jul 2024
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-v53r-9457-4g25

## What is CVE-2024-6528?

CVE-2024-6528 is a medium-severity cross-site scripting vulnerability in Schneider Electric Modicon Controllers M241 / M251, published on 11 Jul 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site
Scripting') vulnerability exists that could cause a vulnerability leading to a cross-site scripting
condition where attackers can have a victim’s browser run arbitrary JavaScript when they visit a
page containing the injected payload.

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

## Which versions are affected by CVE-2024-6528?

It affects 5 products.


Products: Schneider-Electric Modicon Lmc058 Firmware, Schneider-Electric Modicon M241 Firmware, Schneider-Electric Modicon M251 Firmware, Schneider-Electric Modicon M258 Firmware, Schneider-Electric Modicon M262 Firmware.

## How do I fix CVE-2024-6528?

No fix has been published for CVE-2024-6528 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-6528 being exploited?

There is no known exploitation of CVE-2024-6528 in the wild and no public exploit code.

## Other vulnerabilities in Schneider Electric Modicon Controllers M241 / M251

- [CVE-2025-13902](https://insights.sbomify.com/CVE-2025-13902/): Cross-site scripting in Modicon Controllers M241/M251 (medium 5.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-6528 and fix it if it is affected.

What it is: CVE-2024-6528 is a medium-severity cross-site scripting vulnerability in Schneider Electric Modicon Controllers M241 / M251, published on 11 Jul 2024. 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-2024-6528 in the wild and no public exploit code.

Affected product: Schneider Electric Modicon Controllers M241 / M251. 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-2024-6528/ (Markdown: https://insights.sbomify.com/CVE-2024-6528/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-6528
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-6528
- OSV: https://osv.dev/vulnerability/CVE-2024-6528

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-6528/
Summaries are generated and may contain mistakes; the official description above is the record.