How severe is GHSA-xh2j-q4mc-v522?

GHSA-xh2j-q4mc-v522 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-xh2j-q4mc-v522?

GHSA-xh2j-q4mc-v522 affects the following packages: moodle/moodle (Packagist), moodle/moodle (Packagist), moodle/moodle (Packagist), moodle/moodle (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-xh2j-q4mc-v522?

Update moodle/moodle to 3.1.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xh2j-q4mc-v522 is resolved across your whole dependency graph.

How do I detect GHSA-xh2j-q4mc-v522 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moodle/moodle. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-xh2j-q4mc-v522 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-xh2j-q4mc-v522?

O3 pinpoints whether GHSA-xh2j-q4mc-v522 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-xh2j-q4mc-v522 actively exploited in the wild?

Yes. There are 4 known exploit references for GHSA-xh2j-q4mc-v522, including 1 documented proof-of-concept exploit on Exploit-DB and 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-xh2j-q4mc-v522?

GHSA-xh2j-q4mc-v522 has an EPSS (Exploit Prediction Scoring System) score of 32.2%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

What type of vulnerability is GHSA-xh2j-q4mc-v522?

GHSA-xh2j-q4mc-v522 is classified as Code Injection (CWE-94). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-xh2j-q4mc-v522 published, and has it been updated?

GHSA-xh2j-q4mc-v522 was published on May 13, 2022 and was last updated on April 23, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

GHSA-xh2j-q4mc-v522

HIGH

Moodle calculated question type allows remote code execution by Question authors

Also known asCVE-2018-1133

Published

May 13, 2022

Updated

Apr 23, 2024

Affected

4 pkgs

Patched

4 / 4

Exploits

4 known

EPSS Exploitation Probability

via FIRST.org ↗

32.2%probability of exploitation in next 30 days

Moderate Risk98th percentile-8.55%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

4 pkgs affected

🐘moodle/moodle🐘moodle/moodle🐘moodle/moodle🐘moodle/moodle

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`moodle/moodle`	≥ 3.1&&< 3.1.12	3.1.12
🐘Packagist	`moodle/moodle`	≥ 3.2&&< 3.2.9	3.2.9
🐘Packagist	`moodle/moodle`	≥ 3.3&&< 3.3.6	3.3.6
🐘Packagist	`moodle/moodle`	≥ 3.4&&< 3.4.3	3.4.3

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-46551webappsphp

Moodle 3.4.1 - Remote Code Execution

by Darryn Ten · Mar 15, 2019

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moodle/moodle. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update moodle/moodle to 3.1.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xh2j-q4mc-v522 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-xh2j-q4mc-v522 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-xh2j-q4mc-v522. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.

O3 Security · Impact-Aware SCA

Is GHSA-xh2j-q4mc-v522 in your dependencies?

O3 detects GHSA-xh2j-q4mc-v522 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works