CVE-2016-4437

KEVApache Shiro Code Execution Vulnerability

Description

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.

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 vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

PublishedJun 7, 2016

Last modifiedJun 17, 2026

Added to KEVNov 3, 2021

Remediation dueMay 3, 2022

References

packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.htmlThird Party AdvisoryVDB Entry
packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.htmlExploitThird Party Advisory
rhn.redhat.com/errata/RHSA-2016-2035.htmlThird Party Advisory
rhn.redhat.com/errata/RHSA-2016-2036.htmlThird Party Advisory
securityfocus.com/archive/1/538570/100/0/threadedBroken LinkThird Party Advisory
securityfocus.com/bid/91024Broken LinkThird Party Advisory
lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3EMailing List
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4437US Government Resource

0 recent articles mention this CVE

Risk assessment · Critical

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1638 days
CVSS: 9.8 CRITICAL
EPSS (30-day exploit probability): 93.0% · top 1% of all CVEs
Weakness: NVD-CWE-noinfo
Attack vector: Network, remotely reachable
Preconditions: No privileges and no user interaction

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.