CVE-2023-5547

Moodle: xss risk when previewing data in course upload tool

3.3 LowFix available

The course upload preview contained an XSS risk for users uploading unsafe data.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.53%Up 0.5 points since Nov 10, 2023

What each source reports

CVE List Score used 3.3

Moodle: xss risk when previewing data in course upload tool

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: CVE-2023-5547
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2023-2938 3.3

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: EUVD-2023-2938
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-9gqp-3g28-w9xc 6.1

Moodle Cross-site Scripting vulnerability

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: GHSA-9gqp-3g28-w9xc
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 3.3

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: CVE-2023-5547
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 3.3

Moodle: xss risk when previewing data in course upload tool

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: CVE-2023-5547
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSVGHSA-9gqp-3g28-w9xc 6.1

Moodle Cross-site Scripting vulnerability

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: GHSA-9gqp-3g28-w9xc
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-5547 3.3

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: UBUNTU-CVE-2023-5547
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVBIT-moodle-2023-5547 No score

Moodle: xss risk when previewing data in course upload tool

The course upload preview contained an XSS risk for users uploading unsafe data.

Record: BIT-moodle-2023-5547
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`moodle/moodle` Packagist	before 4.3.0-rc2	4.3.0-rc2
`moodle` Bitnami	3.9.0 up to 3.9.24, 3.11.0 up to 3.11.17, 4.0.0 up to 4.0.11, 4.1.0 up to 4.1.6, 4.2.0 up to 4.2.3	3.9.243.11.174.0.114.1.64.2.3
`moodle/moodle` Packagist	before 4.3.0-rc2, 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	4.3.0-rc2
`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, published	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-2023-5547 is a low vulnerability (CVSS 3.3) in Moodle, published November 9, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 45th percentile. Fixed in moodle/moodle 4.3.0-rc2.

References

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This page doesn't list everything

Left out here: 322 versions. The JSON record has them.