JongHwan Shin (zzzsleep)

JongHwan Shin (zzzsleep) is a security researcher credited with 5 disclosed vulnerabilities in the WordSec WordPress vulnerability database, ranked #778 of 3,515 contributors. Their disclosures were published between 2025 and 2026. The most productive year was 2026, with 4 findings.

Their research concentrates on Cross-Site Scripting, which accounts for 3 of their findings (60%). Other recurring categories include Missing Authorization, Path Traversal. The average CVSS score across these disclosures is 6.1, peaking at 7.2. Severity breakdown: 0 critical and 2 high.

The most affected software includes Advanced Custom Fields (1), Image Photo Gallery Final Tiles Grid (1), Ivory Search (1), across 5 distinct plugins, themes and core versions in total.

All 5 disclosed issues have since received a vendor fix.