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Vulnerabilities

Vulnerability · CVE-2016-4437

Apache Shiro Code Execution Vulnerability

Published Jun 7, 2016 · catalog updated Jun 16, 2026 · Apache Shiro

Patch now

CVE-2016-4437 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Apache Shiro against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
93.04%
Remediation
Remediation guidance
Affected products
cpe apache/aurora · cpe apache/shiro · cpe redhat/fuse · cpe redhat/jboss middleware text-only advisories · vendor Apache Shiro

Apache Shiro contains a vulnerability which may allow remote attackers to execute code or bypass intended access restrictions via an unspecified request parameter when a cipher key has not been configured for the "remember me" feature. Initial-access exploit intelligence.

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.

  • cpe apache/auroraversion unspecified
  • cpe apache/shiroversion unspecified
  • cpe redhat/fuse1.0
  • cpe redhat/jboss middleware text-only advisories1.0
  • vendor Apache Shiroversion unspecified

How to fix CVE-2016-4437

What to do

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

Should you patch?

CVE-2016-4437 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Apache Shiro against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with redhat/jboss middleware text-only advisories 1.0. Apply updates per vendor instructions.

What should an analyst verify?

CWE-284: Improper Access Control; CWE-321. EPSS 93.04%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. 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. Jun 7, 2016 · Catalog

    Detected

    Apache Shiro contains a vulnerability which may allow remote attackers to execute code or bypass intended access restrictions via an unspecified request parameter when a cipher key has not been configured for the "remember me" feature.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Apache Shiro contains a vulnerability which may allow remote attackers to execute code or bypass intended access restrictions via an unspecified request parameter when a cipher key has not been configured for the "remember me" feature.

Sources

  • CISA KEVConfirmed exploitationCVE-2016-4437

    Apache Shiro contains a vulnerability which may allow remote attackers to execute code or bypass intended access restrictions via an unspecified request parameter when a cipher key has not been configured for the "remember me" feature.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2016-4437

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2016-4437

    30-day exploitation probability 93.0%

    first.org
  • Exploit DatabasePublic exploit reference48410

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/shiro_rememberme_v124_deserialize

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2016-4437

    Apache Shiro before 1.2.5, when a cipher key has not been configured for the "remember me" feature, allows remote attackers to execute arbitrary code or bypass intended access restrictions via an unspecified request parameter.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2016-4437

    Apache Shiro contains a vulnerability which may allow remote attackers to execute code or bypass intended access restrictions via an unspecified request parameter when a cipher key has not been configured for the "remember me" feature.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.