CVE-2021-36874: Authenticated Insecure Direct Object References (IDOR) vulnerability in WordPress uListing plugin (versions <= 2.0.5).

high Affects ulisting (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2021-09-27; advisory modified 2026-06-17.

Authenticated Insecure Direct Object References (IDOR) vulnerability in WordPress uListing plugin (versions <= 2.0.5).

Package: ulisting (WordPress plugin) WordPress
Affected versions: <=2.0.5
Fixed in: no fix recorded
Severity: high CVSS 7.1
Exploitation: not on CISA KEV · EPSS 1% (65.5th percentile)
Published: 2021-09-27
Source: nvd

References

CWE-639

NVD record ulisting (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

CVE-2021-36879 critical Unauthenticated Privilege Escalation vulnerability in WordPress uListing plugin (versions same package: ulisting (WordPress plugin)
CVE-2021-36880 high Unauthenticated SQL Injection (SQLi) vulnerability in WordPress uListing plugin (versions same package: ulisting (WordPress plugin)
CVE-2021-4343 critical The Unauthenticated Account Creation plugin for WordPress is vulnerable to Unauthenticated same package: ulisting (WordPress plugin)
CVE-2021-4370 critical The uListing plugin for WordPress is vulnerable to authorization bypass as most actions an same package: ulisting (WordPress plugin)
CVE-2021-4381 critical The uListing plugin for WordPress is vulnerable to authorization bypass via wp_route due t same package: ulisting (WordPress plugin)
CVE-2021-4346 critical The uListing plugin for WordPress is vulnerable to Unauthenticated Arbitrary Account Chang same package: ulisting (WordPress plugin)