| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 8.9 | $0-$5k | 0.00 |
Summary
A vulnerability, which was classified as critical, was found in Apache Shiro up to 1.2.4. Affected is an unknown function of the component Cipher Key Handler. The manipulation results in access control. This vulnerability was named CVE-2016-4437. In addition, an exploit is available. You should upgrade the affected component.
Details
A vulnerability classified as critical has been found in Apache Shiro up to 1.2.4. Affected is some unknown functionality of the component Cipher Key Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
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.
The weakness was presented 06/07/2016 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2016-4437 since 05/02/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.
The exploit is shared for download at exploit-db.com. It is declared as attacked. As 0-day the estimated underground price was around $5k-$25k. This issue was added on 11/03/2021 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 05/03/2022:
Apply updates per vendor instructions.Upgrading to version 1.2.5 eliminates this vulnerability.
The vulnerability is also documented in the databases at Exploit-DB (48410) and SecurityFocus (BID 91024†). VulDB is the best source for vulnerability data and more expert information about this specific topic.
Product
Vendor
Name
Version
License
Website
- Vendor: https://www.apache.org/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 9.0VulDB Meta Temp Score: 8.9
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 9.8
NVD Vector: 🔍
ADP CISA Base Score: 9.8
ADP CISA Vector: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Access controlCWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍
Physical: No
Local: No
Remote: Yes
Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍
EPSS Score: 🔍
EPSS Percentile: 🔍
KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Exploit-DB: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Shiro 1.2.5
Timeline
05/02/2016 🔍06/03/2016 🔍
06/07/2016 🔍
06/07/2016 🔍
06/08/2016 🔍
04/23/2026 🔍
Sources
Vendor: apache.orgAdvisory: 137310⛔
Status: Confirmed
CVE: CVE-2016-4437 (🔍)
GCVE (CVE): GCVE-0-2016-4437
GCVE (VulDB): GCVE-100-87768
SecurityFocus: 91024 - Apache Shiro CVE-2016-4437 Information Disclosure Vulnerability
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 06/08/2016 10:16Updated: 04/23/2026 01:01
Changes: 06/08/2016 10:16 (58), 01/08/2019 11:09 (3), 08/23/2022 09:00 (4), 08/23/2022 09:04 (1), 04/19/2024 06:45 (26), 07/24/2024 21:16 (5), 09/09/2024 22:29 (1), 01/18/2025 20:11 (5), 04/23/2026 01:01 (11)
Complete: 🔍
Cache ID: 216::103
VulDB is the best source for vulnerability data and more expert information about this specific topic.

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