# CVE-2020-9439: Cross-site scripting in n/a

> Authenticated attackers can inject arbitrary web script or HTML via multiple GET parameters in the Tin Canny LearnDash Reporting plugin.

- **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:** 23 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-jmxf-gfr2-rfwj

## What is CVE-2020-9439?

CVE-2020-9439 is a medium-severity cross-site scripting vulnerability in n/a, published on 23 Dec 2020. 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

Multiple cross-site scripting (XSS) vulnerabilities in Uncanny Owl Tin Canny LearnDash Reporting before 3.4.4 allows authenticated remote attackers to inject arbitrary web script or HTML via the search_key GET Parameter in TinCan_Content_List_Table.php, message GET Parameter in licensing.php, tc_filter_group parameter in reporting-admin-menu.php, tc_filter_user parameter in reporting-admin-menu.php, tc_filter_course parameter in reporting-admin-menu.php, tc_filter_lesson parameter in reporting-admin-menu.php, tc_filter_module parameter in reporting-admin-menu.php, tc_filter_action parameter in reporting-admin-menu.php, tc_filter_data_range parameter in reporting-admin-menu.php, or tc_filter_data_range_last parameter in reporting-admin-menu.php.

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

## Which versions are affected by CVE-2020-9439?

It affects 1 product.


Products: Uncannyowl Tin Canny Reporting for Learndash.

## How do I fix CVE-2020-9439?

No fix has been published for CVE-2020-9439 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9439 being exploited?

There is no known exploitation of CVE-2020-9439 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9439 and fix it if it is affected.

What it is: CVE-2020-9439 is a medium-severity cross-site scripting vulnerability in n/a, published on 23 Dec 2020. 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-2020-9439 in the wild and no public exploit code.

Affected product: n/a. 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-2020-9439/ (Markdown: https://insights.sbomify.com/CVE-2020-9439/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9439
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9439
- OSV: https://osv.dev/vulnerability/CVE-2020-9439

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9439/
Summaries are generated and may contain mistakes; the official description above is the record.