CVE-2021-20186
MEDIUMCVSS 5.4/10EPSS 0.75%
Last modified
CVE-2021-20186 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS.. EPSS estimates a 0.75% chance of exploitation in the next 30 days.
Description
It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Moodle | Moodle | < 3.5.16 |
| Moodle | Moodle | >= 3.8.0, < 3.8.7 |
| Moodle | Moodle | >= 3.9.0, < 3.9.4 |
| Moodle | Moodle | >= 3.10.0, < 3.10.1 |
References
- https://moodle.org/mod/forum/discuss.php?d=417170Patch, Vendor Advisory
- https://moodle.org/mod/forum/discuss.php?d=417170Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20186?
It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that if the TeX notation filter was enabled, additional sanitizing of TeX content was required to prevent the risk of stored XSS.
How severe is CVE-2021-20186?
CVE-2021-20186 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20186?
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.
Are you affected by CVE-2021-20186?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST