CVE-2021-36401
MEDIUMCVSS 4.8/10EPSS 0.53%
Last modified
CVE-2021-36401 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. In Moodle, ID numbers exported in HTML data formats required additional sanitizing to prevent a local stored XSS risk.. EPSS estimates a 0.53% chance of exploitation in the next 30 days.
Description
In Moodle, ID numbers exported in HTML data formats required additional sanitizing to prevent a local stored XSS risk.
Metrics
CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Moodle | Moodle | < 3.9.8 |
| Moodle | Moodle | >= 3.10.0, < 3.10.5 |
| Moodle | Moodle | >= 3.11.0, < 3.11.1 |
References
- https://moodle.org/mod/forum/discuss.php?d=424807Patch, Vendor Advisory
- https://moodle.org/mod/forum/discuss.php?d=424807Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-36401?
In Moodle, ID numbers exported in HTML data formats required additional sanitizing to prevent a local stored XSS risk.
How severe is CVE-2021-36401?
CVE-2021-36401 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.
How do I fix CVE-2021-36401?
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-2021-36401?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST