CVE-2023-5539
HIGHCVSS 8.8/10EPSS 1.86%
Last modified
CVE-2023-5539 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A remote code execution risk was identified in the Lesson activity. By default this was only available to teachers and managers.. EPSS estimates a 1.86% chance of exploitation in the next 30 days.
Description
A remote code execution risk was identified in the Lesson activity. By default this was only available to teachers and managers.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Moodle | Moodle | < 3.9.24 |
| Moodle | Moodle | >= 3.11.0, < 3.11.17 |
| Moodle | Moodle | >= 4.0.0, < 4.0.11 |
| Moodle | Moodle | >= 4.1.0, < 4.1.6 |
| Moodle | Moodle | >= 4.2.0, < 4.2.3 |
| Fedoraproject | Extra Packages For Enterprise Linux | 7.0 |
| Fedoraproject | Fedora | 38 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2243352Issue Tracking, Patch, Third Party Advisory
- https://moodle.org/mod/forum/discuss.php?d=451580Patch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2243352Issue Tracking, Patch, Third Party Advisory
- https://moodle.org/mod/forum/discuss.php?d=451580Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-5539?
A remote code execution risk was identified in the Lesson activity. By default this was only available to teachers and managers.
How severe is CVE-2023-5539?
CVE-2023-5539 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.86% probability of exploitation in the next 30 days.
How do I fix CVE-2023-5539?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-5539?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST