# CVE-2025-34032: Moodle LMS Jmol Plugin Cross-site Scripting (XSS)

> Reflected XSS in Moodle Jmol plugin allows attackers to execute arbitrary JavaScript via malicious links, potentially hijacking user sessions.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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 Jun 2025
- **Updated:** 14 May 2026
- **Also known as:** GHSA-pj56-mpf8-xh3c

## What is CVE-2025-34032?

CVE-2025-34032 is a medium-severity cross-site scripting vulnerability in Moodle Jmol Plugin, published on 24 Jun 2025. 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

A reflected cross-site scripting (XSS) vulnerability exists in the Moodle LMS Jmol plugin version 6.1 and prior via the data parameter in jsmol.php. The application fails to properly sanitize user input before embedding it into the HTTP response, allowing an attacker to execute arbitrary JavaScript in the victim's browser by crafting a malicious link. This can be used to hijack user sessions or manipulate page content. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-02 UTC.

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

## Which versions are affected by CVE-2025-34032?

It affects 1 product.


Products: Geoffrowland Jmol.

## How do I fix CVE-2025-34032?

No fix has been published for CVE-2025-34032 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34032 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34032 exists.

Public exploit code:

- Moodle LMS Jmol Plugin <= 6.1 - Cross-Site Scripting (nuclei): http/cves/2025/CVE-2025-34032.yaml

## Other vulnerabilities in Moodle Jmol Plugin

- [CVE-2025-34031](https://insights.sbomify.com/CVE-2025-34031/): Moodle LMS Jmol Plugin Path Traversal (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34032 and fix it if it is affected.

What it is: CVE-2025-34032 is a medium-severity cross-site scripting vulnerability in Moodle Jmol Plugin, published on 24 Jun 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34032 exists.

Affected product: Moodle Jmol Plugin. 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-2025-34032/ (Markdown: https://insights.sbomify.com/CVE-2025-34032/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34032
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34032
- OSV: https://osv.dev/vulnerability/CVE-2025-34032

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34032/
Summaries are generated and may contain mistakes; the official description above is the record.