Williwollo (CybrX)

Williwollo (CybrX) is a security researcher credited with 5 disclosed vulnerabilities in the WordSec WordPress vulnerability database, ranked #715 of 3,515 contributors. The disclosure was published in 2026.

Their research concentrates on Unrestricted Upload Of File With Dangerous Type, which accounts for 5 of their findings (100%). The average CVSS score across these disclosures is 8.5, peaking at 8.8. Severity breakdown: 0 critical and 5 high.

The most affected software includes Hustle (1), OS DataHub Maps (1), Swiss Toolkit For WP (1), across 5 distinct plugins, themes and core versions in total.

4 of the 5 disclosed issues have a vendor fix, while 1 remain unpatched. The most severe finding, "Swiss Toolkit For WP <= 1.4.6 - Authenticated (Author+) Arbitrary File Upload via upload_extension_files()", scores 8.8 out of 10.