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Vulnerability details: VCID-gtty-rsag-tyhn
Vulnerability ID VCID-gtty-rsag-tyhn
Aliases CVE-2018-10891
GHSA-p7v9-gjrh-563x
Summary Moodle XSS Vulnerability A flaw was found in moodle before versions 3.5.1, 3.4.4, 3.3.7, 3.1.13. When a quiz question bank is imported, it was possible for the question preview that is displayed to execute JavaScript that is written into the question bank.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
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 0.00417 https://api.first.org/data/v1/epss?cve=CVE-2018-10891
epss 0.00417 https://api.first.org/data/v1/epss?cve=CVE-2018-10891
cvssv3.1 7.3 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10891
generic_textual HIGH https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10891
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-p7v9-gjrh-563x
cvssv3.1 7.3 https://github.com/moodle/moodle
generic_textual HIGH https://github.com/moodle/moodle
cvssv3.1 7.3 https://github.com/moodle/moodle/commit/0b18d0c960c27994dd9870d286f2da3fa5868c06
generic_textual HIGH https://github.com/moodle/moodle/commit/0b18d0c960c27994dd9870d286f2da3fa5868c06
cvssv3.1 7.3 https://moodle.org/mod/forum/discuss.php?d=373371
generic_textual HIGH https://moodle.org/mod/forum/discuss.php?d=373371
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-10891
cvssv3.1 7.3 https://nvd.nist.gov/vuln/detail/CVE-2018-10891
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-10891
cvssv3.1 7.3 https://web.archive.org/web/20210124185945/https://www.securityfocus.com/bid/104739
generic_textual HIGH https://web.archive.org/web/20210124185945/https://www.securityfocus.com/bid/104739
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-10891
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10891
https://github.com/moodle/moodle
https://github.com/moodle/moodle/commit/0b18d0c960c27994dd9870d286f2da3fa5868c06
https://moodle.org/mod/forum/discuss.php?d=373371
https://nvd.nist.gov/vuln/detail/CVE-2018-10891
https://web.archive.org/web/20210124185945/https://www.securityfocus.com/bid/104739
https://web.archive.org/web/20210124185945/https://www.securityfocus.com/bid/104739/
http://www.securityfocus.com/bid/104739
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-p7v9-gjrh-563x https://github.com/advisories/GHSA-p7v9-gjrh-563x
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Found at https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10891
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:N/UI:N/S:U/C:L/I:L/A:L 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: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Found at https://github.com/moodle/moodle/commit/0b18d0c960c27994dd9870d286f2da3fa5868c06
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:N/UI:N/S:U/C:L/I:L/A:L Found at https://moodle.org/mod/forum/discuss.php?d=373371
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:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-10891
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:N/UI:N/S:U/C:L/I:L/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2018-10891
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:N/UI:N/S:U/C:L/I:L/A:L Found at https://web.archive.org/web/20210124185945/https://www.securityfocus.com/bid/104739
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 0.60838
EPSS Score 0.00417
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:30:56.216842+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-p7v9-gjrh-563x/GHSA-p7v9-gjrh-563x.json 36.1.3