CVE-2023-28334

Moodle: users' name enumeration possible via idor on learning plans page

4.3 MediumFix available

Authenticated users were able to enumerate other users' names via the learning plans page.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.55%Up 0.5 points since Mar 24, 2023

What each source reports

NVD Score used 4.3

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: CVE-2023-28334
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200, CWE-639
Updated: 2026-11-02

CVE List 4.3

Moodle: users' name enumeration possible via idor on learning plans page

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: CVE-2023-28334
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

EUVDEUVD-2023-1034 4.3

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: EUVD-2023-1034
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-hh52-g5c4-wprh 4.3

Moodle may allow authenticated users to enumerate other user's names via learning plans page

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: GHSA-hh52-g5c4-wprh
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200, CWE-639
Updated: 2026-11-02

OSV 4.3

Moodle: users' name enumeration possible via idor on learning plans page

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: CVE-2023-28334
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSVGHSA-hh52-g5c4-wprh 4.3

Moodle may allow authenticated users to enumerate other user's names via learning plans page

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: GHSA-hh52-g5c4-wprh
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200, CWE-639
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-28334 4.3

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: UBUNTU-CVE-2023-28334
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVBIT-moodle-2023-28334 No score

Moodle: users' name enumeration possible via idor on learning plans page

Authenticated users were able to enumerate other users' names via the learning plans page.

Record: BIT-moodle-2023-28334
Updated: 2026-11-02

Affected products

moodle

Affected packages

Affected packages
Package	Affected	Fixed
`moodle/moodle` Packagist	4.1.0 up to 4.1.2	4.1.2
`moodle/moodle` Packagist	4.0.0 up to 4.0.7	4.0.7
`moodle/moodle` Packagist	3.11.0 up to 3.11.13	3.11.13
`moodle/moodle` Packagist	before 3.9.20	3.9.20
`moodle` Bitnami	4.0.0 up to 4.0.7, 4.1.0 up to 4.1.2	4.0.74.1.2
`moodle/moodle` Packagist	4.1.0 up to 4.1.2, plus listed versions v4.1.0v4.1.1	4.1.2
`moodle/moodle` Packagist	4.0.0 up to 4.0.7, plus listed versions v4.0.0v4.0.1v4.0.2v4.0.3v4.0.4v4.0.5v4.0.6	4.0.7
`moodle/moodle` Packagist	3.11.0 up to 3.11.13, plus listed versions v3.11.0v3.11.1v3.11.10v3.11.11v3.11.12 Show 8 moreShow less v3.11.2v3.11.3v3.11.4v3.11.5v3.11.6v3.11.7v3.11.8v3.11.9	3.11.13
`moodle/moodle` Packagist	before 3.9.20, plus listed versions v2.3.10v2.3.11v2.3.4v2.3.5v2.3.6 Show 45 moreShow less v2.3.7v2.3.8v2.3.9v2.4.0v2.4.0-rc1v2.4.1v2.4.10v2.4.11v2.4.2v2.4.3v2.4.4v2.4.5v2.4.6v2.4.7v2.4.8v2.4.9v2.5.0v2.5.0-betav2.5.0-rc1v2.5.1v2.5.2v2.5.3v2.5.4v2.5.5v2.5.6v2.5.7v2.5.8v2.5.9v2.6.0v2.6.0-betav2.6.0-rc1v2.6.1v2.6.10v2.6.11v2.6.2v2.6.3v2.6.4v2.6.5v2.6.6v2.6.7v2.6.8v2.6.9v2.7.0v2.7.0-betav2.7.0-rc1	3.9.20
`moodle` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 2.7.9+dfsg-12.7.10+dfsg-12.7.11+dfsg-12.7.11+dfsg-22.7.12+dfsg-13.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1	None known
`moodle` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 3.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-28334 is a medium vulnerability (CVSS 4.3) in Moodle, published March 23, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.55%, the 46th percentile. Fixed in moodle/moodle 4.1.2.

References

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This page doesn't list everything

Left out here: 217 versions. The JSON record has them.