CVE-2023-4021: The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient inp

medium Affects modern-events-calendar-lite (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient inp

Package
modern-events-calendar-lite (WordPress plugin) WordPress
Affected versions
<7.1.0
Fixed in
7.1.0
Severity
medium  CVSS 4.4
Exploitation
not on CISA KEV · EPSS 0% (31.7th percentile)
Published
2023-10-20
Source
nvd

References

CWE-79
NVD recordmodern-events-calendar-lite (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs   How findings are ranked

Related advisories