CVE-2021-36398 json
Moodle Cross-site Scripting vulnerability
published 3y ago modified 2mo ago also BIT-moodle-2021-36398 , EUVD-2023-0918 , GHSA-786g-xv8v-9h93
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
In moodle, ID numbers displayed in the web service token list required additional sanitizing to prevent a stored XSS risk.
Patch / fix
- packagist moodle/moodle 3.11.1
- bitnami moodle 3.11.1
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- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | moodle/moodle | >=3.11, <3.11.1 |
3.11.1 |
| bitnami | moodle | >=3.11.0, <3.11.1 |
3.11.1 |
Affected products
- n/a Moodle
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
moodle.org
/mod/forum/discuss.php?d=424804
web, patch, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-36398
advisory, web
-
github.com
/moodle/moodle
package
Sources
- CVE List CVE-2021-36398
- GitHub Advisory GHSA-786g-xv8v-9h93
- NVD CVE-2021-36398
- OSV BIT-moodle-2021-36398
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.