CVE-2021-32473

Moodle Information Disclosure vulnerability

5.3 MediumFix available

It was possible for a student to view their quiz grade before it had been released, using a quiz web service. Moodle 3.10 to 3.10.3, 3.9 to 3.9.6, 3.8 to 3.8.8, 3.5 to 3.5.17 and earlier unsupported versions are affected

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

1.03%Up 0.1 points since Mar 12, 2022

What each source reports

NVD Score used 5.3

Record: CVE-2021-32473
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-32473
Weakness: CWE-200
Updated: 2026-11-02

EUVDEUVD-2022-1571 No score

Record: EUVD-2022-1571
Updated: 2026-11-03

GitHub AdvisoriesGHSA-wx87-h539-4775 5.3

Moodle Information Disclosure vulnerability

Record: GHSA-wx87-h539-4775
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV 5.3

Record: CVE-2021-32473
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVGHSA-wx87-h539-4775 5.3

Moodle Information Disclosure vulnerability

Record: GHSA-wx87-h539-4775
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-32473 5.3

Record: UBUNTU-CVE-2021-32473
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVBIT-moodle-2021-32473 No score

Record: BIT-moodle-2021-32473
Updated: 2026-11-02

Affected products

moodle

Affected packages

Affected packages
Package	Affected	Fixed
`moodle/moodle` Packagist	3.5 up to 3.5.18	3.5.18
`moodle/moodle` Packagist	3.8 up to 3.8.9	3.8.9
`moodle/moodle` Packagist	3.9 up to 3.9.7	3.9.7
`moodle/moodle` Packagist	3.10 up to 3.10.4	3.10.4
`moodle` Bitnami	before 3.5.18, 3.8.0 up to 3.8.9, 3.9.0 up to 3.9.7, 3.10.0 up to 3.10.4	3.5.183.8.93.9.73.10.4
`moodle/moodle` Packagist	3.5 up to 3.5.18, plus listed versions v3.5.0v3.5.0-betav3.5.0-rc1v3.5.1v3.5.10 Show 15 moreShow less v3.5.11v3.5.12v3.5.13v3.5.14v3.5.15v3.5.16v3.5.17v3.5.2v3.5.3v3.5.4v3.5.5v3.5.6v3.5.7v3.5.8v3.5.9	3.5.18
`moodle/moodle` Packagist	3.8 up to 3.8.9, plus listed versions v3.8.0v3.8.0-betav3.8.0-rc1v3.8.1v3.8.2 Show 6 moreShow less v3.8.3v3.8.4v3.8.5v3.8.6v3.8.7v3.8.8	3.8.9
`moodle/moodle` Packagist	3.9 up to 3.9.7, plus listed versions v3.9.0v3.9.0-betav3.9.0-rc1v3.9.0-rc2v3.9.0-rc3 Show 6 moreShow less v3.9.1v3.9.2v3.9.3v3.9.4v3.9.5v3.9.6	3.9.7
`moodle/moodle` Packagist	3.10 up to 3.10.4, plus listed versions v3.10.0v3.10.0-betav3.10.0-rc1v3.10.0-rc2v3.10.1v3.10.2v3.10.3	3.10.4
`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-2021-32473 is a medium vulnerability (CVSS 5.3) in Moodle, published March 11, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.03%, the 64th percentile. Fixed in moodle/moodle 3.5.18.