CVE-2025-0521

Summary

CVE-2025-0521 is a Stored Cross-Site Scripting (XSS) vulnerability affecting the Post SMTP plugin for WordPress. This issue, which exists in all versions up to 3.0.2, stems from insufficient input sanitization and output escaping in the from and subject parameters. Unauthenticated attackers can exploit this vulnerability by injecting arbitrary web scripts, resulting in the execution of malicious code whenever a user accesses an affected page. This poses a significant security risk and necessitates an immediate update to a patched version of the plugin.

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