CVE-2020-14321

In Moodle before 3.9.1, 3.8.4, 3.7.7 and 3.5.13, teachers of a course were able to assign themselves the manager role within that course.

Published: 2022-08-16 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2020-14321

EPSS CVSS CWE GHSA Affected OS Tracker

Conclusion & alert: CVE-2020-14321 is rated High Risk (69.9/100): CVSS High severity, with high exploitation likelihood (EPSS 16.43%, 97th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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-2020-14321

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	2026-06-16	15.54%	16.43%	+0.88%
2	2026-06-15	39.40%	15.54%	-23.86%
3	2026-01-25	—	39.40%	—

Full EPSS history (36 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-14321

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/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:L) A normal user session is enough; they don’t have to be admin. 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.	2.8	5.9	[email protected]

Weakness enumeration for CVE-2020-14321

CWE-863 MITRE ↗

GitHub Security Advisory for CVE-2020-14321

GHSA-9q29-jcjw-fw7h · Severity: high · Ecosystem: composer — Moodle Incorrect Authorization vulnerability

OS Trackers for CVE-2020-14321

vendor	priority	summary	link
`ubuntu`	medium	CVE-2020-14321 medium priority: Ubuntu including 1 source packages (moodle), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 9, needs-triage 3, ignored 1.	https://ubuntu.com/security/CVE-2020-14321

Affected software / configurations for CVE-2020-14321

Vendor	Product	Version	Raw CPE
moodle	moodle	>= 3.5.0, < 3.5.13	cpe:2.3:a:moodle:moodle::::::::
moodle	moodle	>= 3.7.0, < 3.7.7	cpe:2.3:a:moodle:moodle::::::::
moodle	moodle	>= 3.8.0, < 3.8.4	cpe:2.3:a:moodle:moodle::::::::
moodle	moodle	3.9.0	cpe:2.3:a:moodle:moodle:3.9.0:-::::::

References for CVE-2020-14321

URL	Tags
https://moodle.org/mod/forum/discuss.php?d=407393	Patch Vendor Advisory

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