Slider Future - Arbitrary File Upload (CVE-2026-1405)

CVE-2026-1405 is a critical vulnerability in the Slider Future WordPress plugin that allows unauthenticated attackers to upload arbitrary files due to insufficient file type validation. Exploiting this flaw could enable remote code execution, giving attackers full control over the affected website’s server and potentially leading to data theft, website defacement, or further compromise.

CrowdSec has been tracking this vulnerability and its exploits since 1st of April 2026.

CrowdSec network observations suggest that most exploitation of CVE-2026-1405 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. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2026-1405 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2026-1405 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Attackers exploit the /wp-json/slider-future/v1/upload-image/ endpoint to upload arbitrary files without authentication, leveraging the lack of file type validation in vulnerable WordPress Slider Future plugin versions.