Modular DS - Privilege Escalation (CVE-2026-23550)

CVE-2026-23550 is a critical privilege escalation vulnerability in Modular DS versions up to 2.5.1, caused by incorrect privilege assignment. This flaw allows attackers to gain elevated permissions, potentially leading to full system compromise, data theft, or disruption of services.

CrowdSec has been tracking this vulnerability and its exploits since 11th of February 2026.

CrowdSec network observations suggest that most exploitation of CVE-2026-23550 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. CrowdSec network telemetry also shows that exploitation of CVE-2026-23550 has significantly declined over the past week. Attack volumes are well below the long-term average, suggesting attackers are rapidly losing interest. The vulnerability appears to be falling out of active use across most threat landscapes.

Attackers exploit endpoints such as /index.php/api/modular-connector/login/ and /api/modular-connector/login/ to bypass authentication and escalate privileges, often indicated by a 302 redirect and the presence of a wordpress_logged_in cookie in the response.