CVE-2021-4340: The uListing plugin for WordPress is vulnerable to generic SQL Injection via the ‘listing_id’ parameter in versions up to, and including, 1.6.6 due to insufficient escaping on the user supplied parame

critical Affects ulisting (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

The uListing plugin for WordPress is vulnerable to generic SQL Injection via the ‘listing_id’ parameter in versions up to, and including, 1.6.6 due to insufficient escaping on the user supplied parame

Package
ulisting (WordPress plugin) WordPress
Affected versions
<=1.6.6
Fixed in
no fix recorded
Severity
critical  CVSS 9.8
Exploitation
not on CISA KEV · EPSS 1% (67.4th percentile)
Published
2023-06-07
Source
nvd

References

CWE-89
NVD recordulisting (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