ReviveAdserver Improper Access Control Vulnerability - CVE-2026-50739

A bypass for CVE202634913 exists with proper ownership validation that had not been applied to the reverse operation of linking campaigns and trackers through the tracker-campaigns.php script in Revive Adserver 6.0.7 and earlier. As a result a lowprivileged user could link their trackers to campaigns owned by other managers on the same instance leading to inconsistent ownership relationships.