CVE-2021-24306: The Ultimate Member – User Profile, User Registration, Login & Membership Plugin WordPress plugin before 2.1.20 did not properly sanitise, validate or encode the query string when generating a link to

medium Affects ultimate-member (WordPress plugin). Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

The Ultimate Member – User Profile, User Registration, Login & Membership Plugin WordPress plugin before 2.1.20 did not properly sanitise, validate or encode the query string when generating a link to

Package
ultimate-member (WordPress plugin) WordPress
Affected versions
<2.1.20
Fixed in
2.1.20
Severity
medium  CVSS 5.4
Exploitation
not on CISA KEV · EPSS 1% (49.6th percentile)
Published
2021-05-24
Source
nvd

References

CWE-79
NVD recordultimate-member (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.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden wordpress /var/www/html

# or, without Composer
pipx install phpwarden   &&   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