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Vulnerability details: VCID-2vxx-842q-aqd3
Vulnerability ID VCID-2vxx-842q-aqd3
Aliases CVE-2019-18210
GHSA-q6vw-27c6-jv9c
Summary Moodle Persistent Cross-site Scripting (XSS) Persistent XSS in `/course/modedit.php` of Moodle through 3.7.2 allows authenticated users (Teacher and above) to inject JavaScript into the session of another user (e.g., enrolled student or site administrator) via the introeditor[text] parameter. NOTE: the discoverer and vendor disagree on whether Moodle customers have a reasonable expectation that anyone authenticated as a Teacher can be trusted with the ability to add arbitrary JavaScript (this ability is not documented on Moodle's Teacher_role page). Because the vendor has this expectation, they have stated "this report has been closed as a false positive, and not a bug."
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.0044 https://api.first.org/data/v1/epss?cve=CVE-2019-18210
epss 0.0044 https://api.first.org/data/v1/epss?cve=CVE-2019-18210
cvssv3.1 5.4 https://docs.moodle.org/38/en/Teacher_role
generic_textual MODERATE https://docs.moodle.org/38/en/Teacher_role
cvssv3.1 5.4 https://gist.github.com/Danbardo/4a6b0fe8cb21ec6d7c54e6ac951bdb0a
generic_textual MODERATE https://gist.github.com/Danbardo/4a6b0fe8cb21ec6d7c54e6ac951bdb0a
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-q6vw-27c6-jv9c
cvssv3.1 5.4 https://github.com/moodle/moodle
generic_textual MODERATE https://github.com/moodle/moodle
cvssv2 3.5 https://nvd.nist.gov/vuln/detail/CVE-2019-18210
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2019-18210
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2019-18210
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2019-18210
https://docs.moodle.org/38/en/Teacher_role
https://gist.github.com/Danbardo/4a6b0fe8cb21ec6d7c54e6ac951bdb0a
https://github.com/moodle/moodle
https://nvd.nist.gov/vuln/detail/CVE-2019-18210
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
GHSA-q6vw-27c6-jv9c https://github.com/advisories/GHSA-q6vw-27c6-jv9c
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://docs.moodle.org/38/en/Teacher_role
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://gist.github.com/Danbardo/4a6b0fe8cb21ec6d7c54e6ac951bdb0a
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/moodle/moodle
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:S/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-18210
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-18210
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.62181
EPSS Score 0.0044
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:25:46.691258+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-q6vw-27c6-jv9c/GHSA-q6vw-27c6-jv9c.json 36.1.3