CVE-2020-1957Network attack vector

Authentication bypass via inconsistent request-path parsing

Published Mar 25, 2020 · Updated Aug 4, 2024

Authentication bypass in Apache Shiro before 1.5.2 allows remote attackers to access protected Spring dynamic-controller routes. WebUtils.getRequestUri() used the container's raw request URI for filter-chain matching while Spring resolved servletPath and pathInfo, allowing crafted traversal forms to reach a protected route after Shiro's check. Exposure requires an affected Shiro web application using Spring dynamic controllers; successful requests bypass configured access controls.

CVSS severity9.8
Critical
EPSS probability23.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Apache Shiro before 1.5.2 allows remote attackers to access protected Spring dynamic-controller routes. WebUtils.getRequestUri() used the container's raw request URI for filter-chain matching while Spring resolved servletPath and pathInfo, allowing crafted traversal forms to reach a protected route after Shiro's check. Exposure requires an affected Shiro web application using Spring dynamic controllers; successful requests bypass configured access controls.

The record

CVE
CVE-2020-1957
Published
Mar 25, 2020
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache Shiro
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Apache Shiro to 1.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Shiroversion=Apache Shiro to 1.5.2

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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