CVE-2016-4437
Apache Shiro Code Execution Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 93.04% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 1 May 2020
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022
- Weakness
- CWE-321
- Affected
- apache/aurora · apache/shiro · redhat/fuse · redhat/jboss middleware text-only advisories
- Source
- secalert@redhat.com
EPSS 93.0% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2016-4437
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://rhn.redhat.com/errata/RHSA-2016-2035.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2036.htmlThird Party Advisory
- http://www.securityfocus.com/archive/1/538570/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/91024Broken Link, Third Party Advisory, VDB Entry
- https://lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3EMailing List
- http://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://rhn.redhat.com/errata/RHSA-2016-2035.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2036.htmlThird Party Advisory
- http://www.securityfocus.com/archive/1/538570/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/91024Broken Link, Third Party Advisory, VDB Entry
- https://lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3EMailing List
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4437US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.