Apache Shiro before 1.2.5, when a cipher key has not been configured for the "remember me" feature, allows remote attackers to execute arbit
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.
- Published
- Jun 7, 2016
- Updated
- Jun 16, 2026
- EPSS
- 93.0% · 100th percentile
- CWE
- CWE-321
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Report tools
Action score
97
Now
Patch today or shut off access.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 28 / 30 · 93.0%
CISA SSVC decision
- Exploitation
- active
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Nov 3, 2021. That signals real attacks, not theory.
Remediation deadline for government agencies: May 3, 2022.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| apache | aurora | cpe:2.3:a:apache:aurora |
| apache | shiro | cpe:2.3:a:apache:shiro |
| redhat | fuse | cpe:2.3:a:redhat:fuse |
| redhat | jboss middleware text-only advisories | cpe:2.3:a:redhat:jboss_middleware_text-only_advisories |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache aurora0.10.0 and later · before 0.18.1
- apache shirobefore 1.2.5
- redhat fuse1.0
- redhat jboss middleware text-only advisories1.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | shiro | before 1.2.5-1 | 1.2.5-1 |
| Maven | org.apache.shiro:shiro-core | before 1.2.5 | 1.2.5 |
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-27905Apache Aurora: padding oracle can allow construction an authentication cookie36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Debian:shiro | 1.2.5-1 · Debian:12 | Package registry (OSV) |
| Maven:org.apache.shiro:shiro-core | 1.2.5 | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×1
- Nuclei detection template ×1
- Proof-of-concept repository on GitHub ×6
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2020-05-01 |
| Metasploit module | exploit/multi/http/shiro_rememberme_v124_deserializeApache Shiro v1.2.4 Cookie RememberME Deserial RCEexploit | 2016-06-07 |
| Nuclei detection template | Nuclei template CVE-2016-4437 | — |
| Proof-of-concept repository on GitHub | stars:55 | 2020-05-27 |
| Proof-of-concept repository on GitHub | stars:0 | 2021-06-22 |
| Proof-of-concept repository on GitHub | stars:24 | 2021-12-23 |
| Proof-of-concept repository on GitHub | stars:2 | 2023-12-22 |
| Proof-of-concept repository on GitHub | stars:0 | 2024-01-15 |
| Proof-of-concept repository on GitHub | stars:1 | 2026-02-19 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Metasploitsame day
- Published
- First PoC+1424 d
- CISA KEV+1975 d
- TodaySep 29, 2026+3767 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-321 · Use of Hard-coded Cryptographic KeyCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.html
- rhn.redhat.com/errata/RHSA-2016-2035.html
- rhn.redhat.com/errata/RHSA-2016-2036.html
- www.securityfocus.com/archive/1/538570/100/0/threaded
- www.securityfocus.com/bid/91024
- lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3E
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4437
Vendor advisories and official records. Exploit/PoC links are deliberately left out.