CVE-2020-17523 Authentication bypass in Apache Shiro

What is CVE-2020-17523?

CVE-2020-17523 is a critical authentication bypass vulnerability in Apache Shiro, published on 3 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

Weakness: CWE-287

Which versions are affected by CVE-2020-17523?

6 open source packages ship an affected version, including org.apache.shiro:shiro-spring, org.apache.shiro:shiro-spring-boot-starter and org.apache.shiro:shiro-web. It affects 1 product.

Products include Apache Shiro.

How do I fix CVE-2020-17523?

Upgrade org.apache.shiro:shiro-spring to 1.7.1 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-17523 being exploited?

There is no known exploitation of CVE-2020-17523 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Apache Shiro

• CVE-2023-34478 Path Traversal in Apache Shiro Critical 9.8
• CVE-2022-40664 Authentication Bypass Vulnerability in Shiro when forwarding or including via RequestDispatcher Critical 9.8
• CVE-2022-32532 Authentication Bypass Vulnerability Critical 9.8
• CVE-2021-41303 Apache Shiro vulnerable to a specially crafted HTTP request causing an authentication bypass Critical 9.8
• CVE-2020-17510 Authentication bypass in Apache Shiro Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-v98j-7crc-wvrj.