What is CVE-2018-1045?

CVE-2018-1045 is a medium-severity vulnerability in Moodle, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-01-22.

How severe is CVE-2018-1045?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Moodle

CVE-2018-1045

In Moodle 3.x, there is XSS via a calendar event name.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-01-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Moodle — versions 3.2.0, 3.2.1, 3.2.2
Moodle 3.x — versions Moodle 3.x

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

moodle.org/mod/forum/discuss.php (Vendor Advisory)
www.securityfocus.com/bid/102755 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-1045?: CVE-2018-1045 is a medium-severity vulnerability in Moodle, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-01-22.
How severe is CVE-2018-1045?: Medium severity. CVSS v3 base score is 5.4 out of 10.