600,000 WordPress Sites Affected by SQL Injection Vulnerability in Backuply WordPress Plugin
On September 17th, 2026, we received a submission for a Second-Order SQL Injection vulnerability in Backuply, a WordPress plugin with more than 600,000 active installations. This vulnerability makes it possible for authenticated attackers with subscriber-level access and above to store a malicious SQL payload that is executed when an administrator later restores a database backup, ultimately allowing the attacker to escalate their privileges to administrator and take over the site.
On September 17th, 2026, we received a submission for a Second-Order SQL Injection vulnerability in Backuply, a WordPress plugin with more than 600,000 active installations. This vulnerability makes it possible for authenticated attackers with subscriber-level access and above to store a malicious SQL payload that is executed when an administrator later restores a database backup, ultimately allowing the attacker to escalate their privileges to administrator and take over the site.
Props to daroo who discovered and responsibly reported this vulnerability through the Wordfence Bug Bounty Program. This researcher earned a bounty of $1,352.00 for this discovery. Our mission is to secure WordPress through defense in depth, which is why we are investing in quality vulnerability research and collaborating with researchers of this caliber through our Bug Bounty Program. We are committed to making the WordPress ecosystem more secure through the detection and prevention of vulnerabilities, which is a critical element to the multi-layered approach to security.