No exploitation reportedFix available

CVE-2018-10891

Q: Is CVE-2018-10891 actively exploited?

Active exploitation of CVE-2018-10891 has not been confirmed. Its EPSS score was 2.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-10891?

CVE-2018-10891 has a CVSS v3 base score of 7.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

No exploitation reported by the sources we read.

Published2018-07-10
Fixed in3.5.1 · 3.4.4 · 3.3.7 · 3.2.10 · 3.1.13
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2018-07-1018:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-10891?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-10891?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Moodle

Branch	Affected	Fixed in	Source
3.5	≥ 3.5, < 3.5.1	3.5.1	NVD
3.5	≥ 3.5.0, < 3.5.1	3.5.1	OSV
3.4	≥ 3.4, < 3.4.4	3.4.4	NVD
3.4	≥ 3.4.0, < 3.4.4	3.4.4	OSV
3.3	≥ 3.3, < 3.3.7	3.3.7	NVD
3.3	≥ 3.3.0, < 3.3.7	3.3.7	OSV
3.2	≥ 3.2.0, < 3.2.10	3.2.10	OSV
3.1	≥ 3.1, < 3.1.13	3.1.13	NVD
3.1	≥ 3.1.0, < 3.1.13	3.1.13	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Moodle to 3.5.1 · 3.4.4 · 3.3.7 · 3.2.10 · 3.1.13

Advisories and patches

moodle.orgPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.3read 2026-10-23
CNACVSS 3.06.3read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score2.1 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published: 2018-07-10
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-10891?

Is CVE-2018-10891 actively exploited?

Active exploitation of CVE-2018-10891 has not been confirmed. Its EPSS score was 2.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-10891?

CVE-2018-10891 has a CVSS v3 base score of 7.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

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