XSS2Shell: an XSS on the WordPress login screen reaches code execution on the server
CVE-2026-64638, "XSS2Shell", is a WordPress core vulnerability that turns an unauthenticated XSS on the login screen into PHP code execution on the server. The root cause is a disagreement between two sanitization filters. What it is, why it is serious (core, pre-auth, around 43% of the web) and what to do: update to 7.0.3 and escape correctly at output.
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