Improper Access Control in Apache Shiro
CISA confirms exploitation of this vulnerability in real attacks. Prioritise checking whether your application is affected. CISA KEV · CC0 1.0
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.shiro:shiro-core | < 1.2.5 | 1.2.5 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2016-4437
- https://lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3E
- https://lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4@%3Cannouncements.aurora.apache.org%3E
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4437
- http://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.html
- http://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.html
- http://rhn.redhat.com/errata/RHSA-2016-2035.html
- http://rhn.redhat.com/errata/RHSA-2016-2036.html
- http://www.securityfocus.com/archive/1/538570/100/0/threaded
- http://www.securityfocus.com/bid/91024
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H- Weakness (CWE)
CWE-284, CWE-321- Platform
- Java / Kotlin (Maven)
- Package
org.apache.shiro:shiro-core- Disclosed
- 14.05.2022
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-p836-389h-j692 - CC BY 4.0
Vulnerability history: org.apache.shiro:shiro-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 12
- First → latest
- 02.2020 06.2026
- Without a fix
- 0
- Exploited in attacks
- 1
Severity breakdown
- Critical 6
- High 3
- Medium 2
- Low 1
Disclosures per year
- 2020: 1
- 2021: 4
- 2022: 3
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 3
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Improper Access Control in Apache Shiro this entry
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