---
title: "CVE-2020-17523: Apache Shiro vulnerability | CubePath"
description: "Apache Shiro before 1.7.1, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass."
language: en
source: https://cubepath.com/security/cve/CVE-2020-17523
---

# CVE-2020-17523: Apache Shiro vulnerability | CubePath

## Description

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

Official description from the CVE record, published by apache. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-17523)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.85911 (85.9% probability)

Percentile

99.7%

Scores of

Nov 10, 2026

Model

v2026.06.15

## Affected products

Products listed in the CVE record, as the CNA published them.

- Apache Shiro

  - affected: before 1.7.1

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [lists.apache.org/thread.html/rce5943430a6136d37a1f2fc201d24…](https://lists.apache.org/thread.html/rce5943430a6136d37a1f2fc201d245fe094e2727a0bc27e3b2d43a39%40%3Cdev.shiro.apache.org%3E)
- [\[activemq-gitbox\] 20210210 \[GitHub\] \[activemq\] ehossack-aws opened a new pull request #614: Update shiro to 1.7.1](https://lists.apache.org/thread.html/r5b93ddf97e2c4cda779d22fab30539bdec454cfa5baec4ad0ffae235%40%3Cgitbox.activemq.apache.org%3E)  (lists.apache.org) mailing-list
- [\[activemq-issues\] 20210301 \[jira\] \[Created\] (AMQ-8159) High severity security issues found in Apache Shiro v.1.7.0](https://lists.apache.org/thread.html/rd4b613e121438b97e3eb263cac3137caddb1dbd8f648b73a4f1898a6%40%3Cissues.activemq.apache.org%3E)  (lists.apache.org) mailing-list
- [\[shiro-dev\] 20210331 Re: Request for assistance to backport CVE-2020-13933 fix](https://lists.apache.org/thread.html/r9d93dfb5df016b1a71a808486bc8f9fbafebbdbc8533625f91253f1d%40%3Cdev.shiro.apache.org%3E)  (lists.apache.org) mailing-list
- [\[shiro-dev\] 20210407 Re: Request for assistance to backport CVE-2020-13933 fix](https://lists.apache.org/thread.html/re25b8317b00a50272a7252c4552cf1a81a97984cc2111ef7728e48e0%40%3Cdev.shiro.apache.org%3E)  (lists.apache.org) mailing-list
- [\[shiro-dev\] 20210424 Re: Ask help for upgrading Shiro in CDH platform to 1.7.1](https://lists.apache.org/thread.html/r679ca97813384bdb1a4c087810ba44d9ad9c7c11583979bb7481d196%40%3Cdev.shiro.apache.org%3E)  (lists.apache.org) mailing-list
- [\[activemq-users\] 20210427 Release date for ActiveMQ v5.16.2 to fix CVEs](https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd%40%3Cusers.activemq.apache.org%3E)  (lists.apache.org) mailing-list
- [\[shiro-dev\] 20210504 Re: Request for assistance to backport CVE-2020-13933 fix](https://lists.apache.org/thread.html/r852971e28f54cafa7d325bd7033115c67d613b112a2a1076817390ac%40%3Cdev.shiro.apache.org%3E)  (lists.apache.org) mailing-list

## Timeline

1. ID reserved Aug 12, 2020
2. Record published Feb 3, 2021
3. Record last updated Aug 4, 2024

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## About CubePath

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)