themewinter — Vulnerabilities & Security Advisories 4

Themewinter develops WordPress themes and website templates primarily for small businesses and portfolio sites. Historically, their products have been vulnerable to multiple remote code execution (RCE) and cross-site scripting (XSS) flaws, often stemming from insufficient input sanitization. Four CVEs have been recorded, including critical RCE vulnerabilities in theme options and file upload mechanisms. Security researchers have noted consistent patterns of privilege escalation issues due to improper access controls. While no major public breaches have been documented, the cumulative impact of these vulnerabilities has exposed numerous websites to potential compromise, particularly when themes remain unpatched.