johska
johska is a security researcher credited with 294 disclosed vulnerabilities in the WordSec WordPress vulnerability database, ranked #27 of 3,908 contributors. Their disclosures were published between 2025 and 2026. The most productive year was 2025, with 218 findings.
Their research concentrates on Cross-Site Request Forgery, which accounts for 125 of their findings (43%). Other recurring categories include Improper Neutralization Of Input During Web Page Generation, Deserialization Of Untrusted Data. The average CVSS score across these disclosures is 6.2, peaking at 9.8. Severity breakdown: 4 critical and 48 high.
The most affected software includes WP2LEADS | WordPress und KlickTipp… (5), Kadence Blocks (2), Restrict File Access (2), across 285 distinct plugins, themes and core versions in total.
54 of the 294 disclosed issues have a vendor fix, while 240 remain unpatched. The most severe finding, "Flex QR Code Generator <= 1.2.5 - Unauthenticated Arbitrary File Upload", scores 9.8 out of 10.
#27
of 3,908 researchers
294
285
6.2
Average score of vulnerabilities
Researcher Submissions
Showing the 250 most recent of 294 records. Every record has its own page and is listed in the sitemap.
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