CVE-2020-17523: Apache Shiro

Critical severity, CVSS 9.8. EPSS: 85.9% chance of exploitation in the next 30 days.

Apache Shiro before 1.7.1, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Affected products

• Apache Shiro: before 1.7.1 (fixed in 1.7.1)

Published 2021-02-03. Last modified 2026-06-17.