CVE-2016-4437

Summary

CVE	CVE-2016-4437
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2016-06-07 14:06:13 UTC
Updated	2026-04-22 14:36:05 UTC
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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.942140000 probability, percentile 0.999240000 (date 2026-04-23)

CISA KEV: Listed on 2021-11-03; due 2022-05-03; ransomware use Unknown

Problem Types: NVD-CWE-noinfo | CWE-321 | n/a | CWE-321 CWE-321 Use of Hard-coded Cryptographic Key

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	9.8	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
3.1	ADP	DECLARED	9.8	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
3.1	134c704f-9b21-4f2e-91b3-4a467353bcc0	Secondary	9.8	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
2.0	[email protected]	Primary	6.8		`AV:N/AC:M/Au:N/C:P/I:P/A:P`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

CVSS v2.0 Breakdown

Access Vector

Network

Access Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

AV:N/AC:M/Au:N/C:P/I:P/A:P

CISA Known Exploited Vulnerability

Vendor	Apache
Product	Shiro
Name	Apache Shiro Code Execution Vulnerability
Required Action	Apply updates per vendor instructions.
Notes	https://nvd.nist.gov/vuln/detail/CVE-2016-4437

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Apache	Aurora	All	All	All	All
Application	Apache	Shiro	All	All	All	All
Application	Redhat	Fuse	1.0	All	All	All
Application	Redhat	Jboss Middleware Text-only Advisories	1.0	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Na	N/a	affected n/a	Not specified

References

Reference	Source	Link	Tags
SecurityFocus	af854a3a-2127-422b-91ae-364da2661108	www.securityfocus.com	Broken Link, Third Party Advisory, VDB Entry
Apache Shiro 1.2.4 Remote Code Execution ≈ Packet Storm	af854a3a-2127-422b-91ae-364da2661108	packetstormsecurity.com	Exploit, Third Party Advisory, VDB Entry
Red Hat Customer Portal	af854a3a-2127-422b-91ae-364da2661108	rhn.redhat.com	Third Party Advisory
Apache Shiro CVE-2016-4437 Information Disclosure Vulnerability	af854a3a-2127-422b-91ae-364da2661108	www.securityfocus.com	Broken Link, Third Party Advisory, VDB Entry
Apache Shiro 1.2.4 Information Disclosure ≈ Packet Storm	af854a3a-2127-422b-91ae-364da2661108	packetstormsecurity.com	Third Party Advisory, VDB Entry
www.cisa.gov/known-exploited-vulnerabilities-catalog	134c704f-9b21-4f2e-91b3-4a467353bcc0	www.cisa.gov	US Government Resource
Red Hat Customer Portal	af854a3a-2127-422b-91ae-364da2661108	rhn.redhat.com	Third Party Advisory
Pony Mail!	af854a3a-2127-422b-91ae-364da2661108	lists.apache.org	Mailing List
Pony Mail!	MITRE	lists.apache.org
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis
CISA Known Exploited Vulnerabilities catalog	CISA	www.cisa.gov	kev

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Source	Time	Event
ADP	2021-11-03T00:00:00.000Z	CVE-2016-4437 added to CISA KEV

Legacy QID Mappings

730496 Apache Shiro Remote Code Execution (RCE) Vulnerability