CVE-2019-3810

Moodle XSS Vulnerability

4.3 MediumPublic exploitFix available

A flaw was found in moodle versions 3.6 to 3.6.1, 3.5 to 3.5.3, 3.4 to 3.4.6, 3.1 to 3.1.15 and earlier unsupported versions. The /userpix/ page did not escape users' full names, which are included as text when hovering over profile images. Note this page is not linked to by default and its access is restricted.

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: None
Integrity: Low
Availability: None

Exploit likelihood

13.8%Up 13.0 points since Apr 14, 2021

What each source reports

CVE List Score used 4.3

Record: CVE-2019-3810
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2022-5591 4.3

Record: EUVD-2022-5591
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-wm4w-8vc6-2j4h 5.3

Moodle XSS Vulnerability

Record: GHSA-wm4w-8vc6-2j4h
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-79
Updated: 2026-11-02

NVD 6.1

Record: CVE-2019-3810
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 6.1

Record: CVE-2019-3810
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

OSVGHSA-wm4w-8vc6-2j4h 5.3

Moodle XSS Vulnerability

Record: GHSA-wm4w-8vc6-2j4h
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-79
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-3810 6.1

Record: UBUNTU-CVE-2019-3810
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 3.0: 4.3 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`moodle/moodle` Packagist	3.6.0 up to 3.6.1	3.6.1
`moodle/moodle` Packagist	3.5.0 up to 3.5.3	3.5.3
`moodle/moodle` Packagist	3.4.0 up to 3.4.6	3.4.6
`moodle/moodle` Packagist	3.1.0 up to 3.1.15	3.1.15
`moodle/moodle` Packagist	3.6.0 up to 3.6.1, plus listed versions v3.6.0	3.6.1
`moodle/moodle` Packagist	3.5.0 up to 3.5.3, plus listed versions v3.5.0v3.5.1v3.5.2	3.5.3
`moodle/moodle` Packagist	3.4.0 up to 3.4.6, plus listed versions v3.4.0v3.4.1v3.4.2v3.4.3v3.4.4v3.4.5	3.4.6
`moodle/moodle` Packagist	3.1.0 up to 3.1.15, plus listed versions v3.1.0v3.1.1v3.1.10v3.1.11v3.1.12 Show 10 moreShow less v3.1.13v3.1.14v3.1.2v3.1.3v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9	3.1.15
`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

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Moodle 3.6.1 - Persistent Cross-Site Scripting (XSS)	2021-04-30
PoC in GitHub	farisv/Moodle-CVE-2019-3810	2021-04-29

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD, OSV, PoC in GitHub

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

In short

CVE-2019-3810 is a medium vulnerability (CVSS 4.3) in [unknown] Moodle, published March 25, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 13.8%, the 96th percentile. Fixed in moodle/moodle 3.6.1.