CVE-2022-40313

Moodle Stored Cross-site Scripting and page denial of service

7.1 HighFix available

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.72%Down 0.2 points since Oct 1, 2022

What each source reports

NVD Score used 7.1

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Record: CVE-2022-40313
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

CVE List 7.1

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Record: CVE-2022-40313
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2022-7119 7.1

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Record: EUVD-2022-7119
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-jqgr-gh62-jf53 7.1

Moodle Stored Cross-site Scripting and page denial of service

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an Cross-site Scripting risk or a page failing to load.

Record: GHSA-jqgr-gh62-jf53
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

OSV 7.1

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Record: CVE-2022-40313
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Updated: 2026-11-02

OSVGHSA-jqgr-gh62-jf53 7.1

Moodle Stored Cross-site Scripting and page denial of service

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an Cross-site Scripting risk or a page failing to load.

Record: GHSA-jqgr-gh62-jf53
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

OSVUBUNTU-CVE-2022-40313 7.1

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Record: UBUNTU-CVE-2022-40313
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Updated: 2026-11-02

OSVBIT-moodle-2022-40313 No score

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

Record: BIT-moodle-2022-40313
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`moodle/moodle` Packagist	3.9 up to 3.9.17	3.9.17
`moodle/moodle` Packagist	3.11 up to 3.11.10	3.11.10
`moodle/moodle` Packagist	4.0 up to 4.0.4	4.0.4
`moodle` Bitnami	3.9.0 up to 3.9.17, 3.11.0 up to 3.11.10, 4.0.0 up to 4.0.4	3.9.173.11.104.0.4
`moodle/moodle` Packagist	3.9 up to 3.9.17, plus listed versions v3.9.0v3.9.0-betav3.9.0-rc1v3.9.0-rc2v3.9.0-rc3 Show 16 moreShow less v3.9.1v3.9.10v3.9.11v3.9.12v3.9.13v3.9.14v3.9.15v3.9.16v3.9.2v3.9.3v3.9.4v3.9.5v3.9.6v3.9.7v3.9.8v3.9.9	3.9.17
`moodle/moodle` Packagist	3.11 up to 3.11.10, plus listed versions v3.11.0v3.11.0-betav3.11.0-rc1v3.11.0-rc2v3.11.1 Show 8 moreShow less v3.11.2v3.11.3v3.11.4v3.11.5v3.11.6v3.11.7v3.11.8v3.11.9	3.11.10
`moodle/moodle` Packagist	4.0 up to 4.0.4, plus listed versions v4.0.0v4.0.0-betav4.0.0-rc1v4.0.0-rc2v4.0.0-rc3 Show 4 moreShow less v4.0.0-rc4v4.0.1v4.0.2v4.0.3	4.0.4
`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 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2022-40313 is a high vulnerability (CVSS 7.1) in Moodle, published September 30, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.72%, the 53rd percentile. Fixed in moodle/moodle 3.9.17.

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

In short

References