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Vulnerabilities

Vulnerability · CVE-2020-1957

Apache Shiro with Spring Dynamic Controllers Authentication Bypass

Published Apr 12, 2021 · catalog updated Apr 12, 2021 · Apache Shiro

Patch now

CVE-2020-1957 is in the CISA known-exploited catalog. Confirm Apache Shiro against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
23.33%
Remediation
Remediation guidance
Affected products
vendor Apache Shiro

Apache Shiro before 1.5.2, when using Apache Shiro with Spring dynamic controllers, a specially crafted request may cause an authentication bypass.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Apache Shiroversion unspecified

How to fix CVE-2020-1957

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-1957 is in the CISA known-exploited catalog. Confirm Apache Shiro against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 23.33%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 12, 2021 · VulnCheck KEV

    Detected

    Apache Shiro before 1.5.2, when using Apache Shiro with Spring dynamic controllers, a specially crafted request may cause an authentication bypass.

  2. Apr 12, 2021 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2020-1957

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-1957

    30-day exploitation probability 23.3%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2020-1957

    Apache Shiro before 1.5.2, when using Apache Shiro with Spring dynamic controllers, a specially crafted request may cause an authentication bypass.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.