CVE-2021-36398

Name: CVE-2021-36398
Creator: NVD / NIST
Published: 2023-03-06T22:15:09.42+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2021-36398 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. In moodle, ID numbers displayed in the web service token list required additional sanitizing to prevent a stored XSS risk.. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

In moodle, ID numbers displayed in the web service token list required additional sanitizing to prevent a stored XSS risk.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.52%

39.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Moodle	Moodle	3.11.0

References

https://moodle.org/mod/forum/discuss.php?d=424804Patch, Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=424804Patch, Vendor Advisory

Timeline

Published: Mar 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36398?

In moodle, ID numbers displayed in the web service token list required additional sanitizing to prevent a stored XSS risk.

How severe is CVE-2021-36398?

CVE-2021-36398 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36398?

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-2021-36398?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST