CVE-2019-17673: Debian Linux

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

WordPress before 5.2.4 is vulnerable to poisoning of the cache of JSON GET requests because certain requests lack a Vary: Origin header.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• WordPress WordPress: before 5.2.4 (fixed in 5.2.4)

Published 2019-10-17. Last modified 2026-06-17.