CVE-2018-17866: Multiple cross-site scripting (XSS) vulnerabilities in includes/core/um-actions-login.php in the "Ultimate Member - User Profile & Membership" plugin before 2.0.28 for WordPress allow remote attackers

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

Multiple cross-site scripting (XSS) vulnerabilities in includes/core/um-actions-login.php in the "Ultimate Member - User Profile & Membership" plugin before 2.0.28 for WordPress allow remote attackers

Package
ultimate-member (WordPress plugin) WordPress
Affected versions
<2.0.28
Fixed in
2.0.28
Severity
medium  CVSS 6.1
Exploitation
not on CISA KEV · EPSS 2% (76.4th percentile)
Published
2018-10-09
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.

# 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