CVE-2021-36394 json
Moodle Session Fixation vulnerability
published 2023-03-06 3 y ago modified 2026-09-08 2 mo ago also BIT-moodle-2021-36394 , EUVD-2023-0826 , GHSA-2563-fp9c-mgm8
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 7.0%
- EPSS 7.0% chance of exploitation in 30 days, percentile 94%
- public exploits
- 0
- none known
Summary
In Moodle, a remote code execution risk was identified in the Shibboleth authentication plugin.
Patch / fix
- packagist moodle/moodle 3.9.8, 3.10.5, 3.11.1
- bitnami moodle 3.9.8, 3.10.5, 3.11.1
- moodle moodle 3.9.8, 3.10.5, 3.11.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 20 mo ago
Exploit prediction
7.03% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | moodle/moodle | >=3.11.0-beta, <3.11.1 >=3.10.0-beta, <3.10.5 <3.9.8 |
3.11.1 3.10.5 3.9.8 |
| bitnami | moodle | <3.9.8 >=3.10.0, <3.10.5 >=3.11.0, <3.11.1 |
3.9.8 3.10.5 3.11.1 |
Affected products
- n/a Moodle
Classification
References
-
moodle.org
/mod/forum/discuss.php?d=424799
web, patch, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-36394
advisory, web
-
github.com
/moodle/moodle
package
Sources
- CVE List CVE-2021-36394
- GitHub Advisory GHSA-2563-fp9c-mgm8
- NVD CVE-2021-36394
- OSV BIT-moodle-2021-36394
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