Alex Tselevich (nos3curity)
Alex Tselevich (nos3curity) is a security researcher credited with 11 disclosed vulnerabilities in the WordSec WordPress vulnerability database, ranked #401 of 3,515 contributors. Their disclosures were published between 2025 and 2026. The most productive year was 2025, with 8 findings.
Their research concentrates on Cross-Site Scripting, which accounts for 5 of their findings (45%). Other recurring categories include Code Injection, SQL Injection. The average CVSS score across these disclosures is 6.6, peaking at 9.8. Severity breakdown: 1 critical and 3 high.
The most affected software includes HandL UTM Grabber / Tracker (2), Logo Slider WP (1), Ocean Modal Window (1), across 10 distinct plugins, themes and core versions in total.
10 of the 11 disclosed issues have a vendor fix, while 1 remain unpatched. The most severe finding, "Responsive Plus – Elementor Templates & Starter Sites < 3.4.3 - Unauthenticated Arbitrary Code Execution", scores 9.8 out of 10.
#401
of 3,515 researchers
11
10
6.6
Average score of vulnerabilities
Researcher Submissions
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