Christiaan Swiers (YouGina)

Christiaan Swiers (YouGina) is a security researcher credited with 9 disclosed vulnerabilities in the WordSec WordPress vulnerability database, ranked #475 of 3,515 contributors. Their disclosures were published between 2022 and 2025. The most productive year was 2024, with 4 findings.

Their research concentrates on SQL Injection, which accounts for 6 of their findings (67%). Other recurring categories include Cross-Site Scripting, Improper Authorization. The average CVSS score across these disclosures is 7.4, peaking at 9.8. Severity breakdown: 1 critical and 5 high.

The most affected software includes Better Search Replace (1), Booster Elite for WooCommerce (1), Broken Link Checker by AIOSEO (1), across 9 distinct plugins, themes and core versions in total.

8 of the 9 disclosed issues have a vendor fix, while 1 remain unpatched. The most severe finding, "Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin 2.1.3 - 2.8.2 - Unauthenticated SQL Injection", scores 9.8 out of 10.