CVE-2023-5548

Moodle: cache poisoning risk with endpoint revision numbers

3.3 LowFix available

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

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

0.32%Up 0.3 points since Nov 10, 2023

What each source reports

CVE List Score used 3.3

Moodle: cache poisoning risk with endpoint revision numbers

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: CVE-2023-5548
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-349
Updated: 2026-11-02

EUVDEUVD-2023-2954 3.3

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: EUVD-2023-2954
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-cwh2-q44x-5w3c 5.3

Moodle Acceptance of Extraneous Untrusted Data With Trusted Data vulnerability

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: GHSA-cwh2-q44x-5w3c
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-345, CWE-349
Updated: 2026-11-02

NVD 3.3

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: CVE-2023-5548
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: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-349, CWE-345
Updated: 2026-11-02

OSV 3.3

Moodle: cache poisoning risk with endpoint revision numbers

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: CVE-2023-5548
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-349
Updated: 2026-11-02

OSVGHSA-cwh2-q44x-5w3c 5.3

Moodle Acceptance of Extraneous Untrusted Data With Trusted Data vulnerability

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: GHSA-cwh2-q44x-5w3c
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-345, CWE-349
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-5548 3.3

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: UBUNTU-CVE-2023-5548
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: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVBIT-moodle-2023-5548 No score

Moodle: cache poisoning risk with endpoint revision numbers

Stronger revision number limitations were required on file serving endpoints to improve cache poisoning protection.

Record: BIT-moodle-2023-5548
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	before 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-2023-5548 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 0.32%, the 25th 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.