# CVE-2022-35653: Moodle LTI module reflected XSS risk

> Reflected XSS in Moodle LTI module allows attackers to execute scripts in victim browsers via crafted links, enabling data theft and phishing.

- **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:** Yes
- **Published:** 25 Jul 2022
- **Updated:** 3 Aug 2024
- **Also known as:** BIT-moodle-2022-35653, GHSA-62wh-m4jr-233r, UBUNTU-CVE-2022-35653

## What is CVE-2022-35653?

CVE-2022-35653 is a medium-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 25 Jul 2022. 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 XSS issue was identified in the LTI module of Moodle. The vulnerability exists due to insufficient sanitization of user-supplied data in the LTI module. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website to steal potentially sensitive information, change appearance of the web page, can perform phishing and drive-by-download attacks. This vulnerability does not impact authenticated users.

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

## Which versions are affected by CVE-2022-35653?

7 open source packages ship an affected version, including moodle/moodle and moodle. It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `moodle/moodle` | Packagist | From 3.11 | 3.11.8 |
| `moodle/moodle` | Packagist | From 3.11 | 3.11.8 |
| `moodle/moodle` | Packagist | From 3.9 | 3.9.15 |
| `moodle/moodle` | Packagist | From 3.9 | 3.9.15 |
| `moodle/moodle` | Packagist | From 4.0 | 4.0.2 |
| `moodle/moodle` | Packagist | From 4.0 | 4.0.2 |
| `moodle` | Bitnami | From 3.9.0 | 3.9.15, 3.11.8, 4.0.1, 4.0.2 |

Products: Fedoraproject Fedora, Moodle Moodle, Redhat Enterprise Linux.

## How do I fix CVE-2022-35653?

Upgrade moodle/moodle to a fixed version for your release line: 3.11.8, 3.9.15 or 4.0.2.

## Is CVE-2022-35653 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-35653 exists.

Public exploit code:

- Moodle LTI module Reflected - Cross-Site Scripting (nuclei): http/cves/2022/CVE-2022-35653.yaml

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-35653 and fix it if it is affected.

What it is: CVE-2022-35653 is a medium-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 25 Jul 2022. 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-2022-35653 exists.

Affected packages and fixed versions:
- moodle/moodle (Packagist): affected from 3.11; fixed in 3.11.8
- moodle/moodle (Packagist): affected from 3.11; fixed in 3.11.8
- moodle/moodle (Packagist): affected from 3.9; fixed in 3.9.15
- moodle/moodle (Packagist): affected from 3.9; fixed in 3.9.15
- moodle/moodle (Packagist): affected from 4.0; fixed in 4.0.2
- moodle/moodle (Packagist): affected from 4.0; fixed in 4.0.2
- moodle (Bitnami): affected from 3.9.0; fixed in 3.9.15, 3.11.8, 4.0.1, 4.0.2

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-2022-35653/ (Markdown: https://insights.sbomify.com/CVE-2022-35653/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-35653
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-35653
- OSV: https://osv.dev/vulnerability/CVE-2022-35653

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-35653/
Summaries are generated and may contain mistakes; the official description above is the record.