CVE-2021-36392

In Moodle, an SQL injection risk was identified in the library fetching a user's enrolled courses.

Published: 2023-03-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-36392 is rated Moderate Risk (57.2/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.84%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-36392

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.35% 0.84% -0.51%
2 2026-05-14 0.81% 1.35% +0.54%
3 2026-03-08 — 0.81% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-36392

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2021-36392

GitHub Security Advisory for CVE-2021-36392

GHSA-qc86-vgf2-6fq6 · Severity: critical · Ecosystem: composer — Moodle SQL Injection vulnerability

OS Trackers for CVE-2021-36392

vendor priority summary link
ubuntu medium CVE-2021-36392 medium priority: Ubuntu including 1 source packages (moodle), 7 status rows across 7 suites (bionic, focal, jammy, kinetic, trusty, upstream, xenial): DNE 3, needs-triage 3, ignored 1. https://ubuntu.com/security/CVE-2021-36392

Affected software / configurations for CVE-2021-36392

Vendor Product Version Raw CPE
moodle moodle < 3.9.8 cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle >= 3.10.0, < 3.10.5 cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle >= 3.11.0, < 3.11.1 cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*

References for CVE-2021-36392

URL Tags
https://moodle.org/mod/forum/discuss.php?d=424797 Patch Vendor Advisory
cvelogic Threat Intelligence