Highlights
Reflected XSS: 2 prior fixes. Scrutinize any change in this area.
all_in_one_seo_pack.php: most-fixed (2 issues). Treat as high-risk during review.
0 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Reflected XSS: Unescaped query arguments generated via add_query_arg are output directly, leading to Reflected XSS when navigating admin tabs. The fix requires consistent application of esc_url() or esc_url_raw() on dynamic URLs.
Stored XSS: Post metadata retrieved via get_post_meta is output directly in the post list columns without proper escaping, allowing persistent script execution. Robust sanitization using htmlspecialchars() and stripcslashes() is mandatory.
Reflected XSS: The request_as_words function fails to sanitize request-derived URLs before echoing, allowing attackers to inject malicious payloads via the request path.