# CVE-2025-55289: Chamilo: Stored Cross Site Scripting in Skills Argumentation

> Attackers can inject malicious scripts into Chamilo LMS social and messaging features, leading to session hijacking and account takeover for authenticated users.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Mar 2026
- **Updated:** 6 Mar 2026
- **Also known as:** GHSA-cchj-3qmf-82j5

## What is CVE-2025-55289?

CVE-2025-55289 is a high-severity cross-site scripting vulnerability in Chamilo Chamilo Lms, published on 6 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Chamilo is a learning management system. Prior to version 1.11.34, there is a stored XSS vulnerability in Chamilo LMS (Verison 1.11.32) allows an attacker to inject arbitrary JavaScript into the platform’s social network and internal messaging features. When viewed by an authenticated user (including administrators), the payload executes in their browser within the LMS context. This enables full account takeover via session hijacking, unauthorized actions with the victim’s privileges, exfiltration of sensitive data, and potential self-propagation to other users. This issue has been patched in version 1.11.34.

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

## Which versions are affected by CVE-2025-55289?

It affects 1 product.


Products: Chamilo Chamilo Lms.

## How do I fix CVE-2025-55289?

No fix has been published for CVE-2025-55289 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-55289 being exploited?

There is no known exploitation of CVE-2025-55289 in the wild and no public exploit code.

## Other vulnerabilities in Chamilo Chamilo Lms

- [CVE-2025-50187](https://insights.sbomify.com/CVE-2025-50187/): Chamilo: Evaluation of untrusted user input leads to Remote Code Execution (critical 9.8)
- [CVE-2023-34944](https://insights.sbomify.com/CVE-2023-34944/): File upload in n/a (critical 9.8)
- [CVE-2022-27423](https://insights.sbomify.com/CVE-2022-27423/): SQL injection in n/a (critical 9.8)
- [CVE-2021-35414](https://insights.sbomify.com/CVE-2021-35414/): SQL injection in n/a (critical 9.8)
- [CVE-2019-13082](https://insights.sbomify.com/CVE-2019-13082/): File upload in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-55289 and fix it if it is affected.

What it is: CVE-2025-55289 is a high-severity cross-site scripting vulnerability in Chamilo Chamilo Lms, published on 6 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-55289 in the wild and no public exploit code.

Affected product: Chamilo Chamilo Lms. 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-2025-55289/ (Markdown: https://insights.sbomify.com/CVE-2025-55289/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-55289
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-55289
- OSV: https://osv.dev/vulnerability/CVE-2025-55289

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-55289/
Summaries are generated and may contain mistakes; the official description above is the record.