CVE-2026-54414: ERROR311 Filerise

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

FileRise before 3.16.0 is vulnerable to path traversal in the shared-folder upload endpoint (/api/folder/uploadToSharedFolder.php), leading to arbitrary file write and administrator account takeover. The upload filename is validated by FolderController with basename and REGEX_FILE_NAME, which permit URL-encoded sequences (the regex blocks / and \ but not %).

Affected products

• ERROR311 Filerise: up to and including 3.16.0

Published 2026-06-19. Last modified 2026-08-10.