CVE-2021-47157: Kossy

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.

Affected products

• Kossy Kossy: before 0.60 (fixed in 0.60)

Published 2024-03-18. Last modified 2026-06-17.