# CVE-2021-39348: LearnPress – WordPress LMS Plugin <= 4.1.3.1 Authenticated Stored Cross-Site Scripting

> Administrators can inject arbitrary scripts via the custom profile parameter in LearnPress, requiring unfiltered_html to be disabled.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Oct 2021
- **Updated:** 14 Feb 2025
- **Also known as:** GHSA-8wvx-x66h-gvp7

## What is CVE-2021-39348?

CVE-2021-39348 is a medium-severity cross-site scripting vulnerability in LearnPress, published on 21 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The LearnPress WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient escaping on the $custom_profile parameter found in the ~/inc/admin/views/backend-user-profile.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 4.1.3.1. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled. Please note that this is seperate from CVE-2021-24702.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## Which versions are affected by CVE-2021-39348?

It affects 1 product.


Products: Thimpress Learnpress.

## How do I fix CVE-2021-39348?

No fix has been published for CVE-2021-39348 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-39348 being exploited?

There is no known exploitation of CVE-2021-39348 in the wild and no public exploit code.

## Other vulnerabilities in LearnPress

- [CVE-2024-8522](https://insights.sbomify.com/CVE-2024-8522/): LearnPress – WordPress LMS Plugin <= 4.2.7 - Unauthenticated SQL Injection via 'c_only_fields' (critical 10.0)
- [CVE-2024-8529](https://insights.sbomify.com/CVE-2024-8529/): LearnPress – WordPress LMS Plugin <= 4.2.7 - Unauthenticated SQL Injection via 'c_fields' (critical 10.0)
- [CVE-2022-45808](https://insights.sbomify.com/CVE-2022-45808/): WordPress LearnPress Plugin <= 4.1.7.3.2 is vulnerable to SQL Injection (critical 9.9)
- [CVE-2024-4434](https://insights.sbomify.com/CVE-2024-4434/): LearnPress – WordPress LMS Plugin <= 4.2.6.5 - Unauthenticated Time-Based SQL Injection (critical 9.8)
- [CVE-2023-6567](https://insights.sbomify.com/CVE-2023-6567/): LearnPress <= 4.2.5.7 - Unauthenticated SQL Injection via order_by (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-39348 and fix it if it is affected.

What it is: CVE-2021-39348 is a medium-severity cross-site scripting vulnerability in LearnPress, published on 21 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-39348 in the wild and no public exploit code.

Affected product: LearnPress. 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-2021-39348/ (Markdown: https://insights.sbomify.com/CVE-2021-39348/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-39348
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-39348
- OSV: https://osv.dev/vulnerability/CVE-2021-39348

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-39348/
Summaries are generated and may contain mistakes; the official description above is the record.