Description
The Admin Custom Login plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.6.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
References6
- plugins.trac.wordpress.org/browser/admin-custom-login/tags/3.6.…
- plugins.trac.wordpress.org/browser/admin-custom-login/tags/3.6.…
- plugins.trac.wordpress.org/browser/admin-custom-login/trunk/inc…
- plugins.trac.wordpress.org/browser/admin-custom-login/trunk/log…
- plugins.trac.wordpress.org/changeset?reponame=&old=3510948%40ad…
- www.wordfence.com/threat-intel/vulnerabilities/id/0e81b6c1-5af5…
Metrics
- CVSS 3.1
-
4.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 26 · as of 11 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.