CVE-2024-25978 is a high-severity (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in moodle/moodle. A fix is available for moodle/moodle — see the affected versions and patch details below.
Msa-24-0001: denial of service risk in file picker unzip functionality
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2024-25978.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
moodle/moodle🐘moodle/moodle🐘moodle/moodleReal-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
Insufficient file size checks resulted in a denial of service risk in the file picker's unzip functionality.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | moodle/moodle | ≥ 4.3.0&&< 4.3.3 | 4.3.3composer require moodle/moodle:^4.3.3 |
| 🐘Packagist | moodle/moodle | ≥ 4.2.0&&< 4.2.6 | 4.2.6composer require moodle/moodle:^4.2.6 |
| 🐘Packagist | moodle/moodle | all versions | 4.1.9composer require moodle/moodle:^4.1.9 |
Affected Products
fedorafedoraprojectmoodlemoodleDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moodle/moodle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update moodle/moodle to 4.3.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-25978 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.
Frequently Asked Questions
Is CVE-2024-25978 in your dependencies?
Find it across Packagist, including transitive dependencies.