CVE-2023-6000: The Popup Builder WordPress plugin before 4.2.3 does not prevent simple visitors from updating existing popups, and injecting raw JavaScript in them, which could lead to Stored XSS attacks.

medium Affects popup-builder (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

The Popup Builder WordPress plugin before 4.2.3 does not prevent simple visitors from updating existing popups, and injecting raw JavaScript in them, which could lead to Stored XSS attacks.

Package
popup-builder (WordPress plugin) WordPress
Affected versions
<4.2.3
Fixed in
4.2.3
Severity
medium  CVSS 6.1
Exploitation
not on CISA KEV · EPSS 2% (80.7th percentile)
Published
2024-01-01
Source
nvd

References

CWE-79
NVD recordpopup-builder (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