How severe is CVE-2017-12149?

CVE-2017-12149 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which products are affected by CVE-2017-12149?

CVE-2017-12149 affects the following products: redhat jboss enterprise application platform.

How do I patch CVE-2017-12149?

No patch has shipped for CVE-2017-12149 yet — track the redhat jboss enterprise application platform advisory for a fixed release and apply the workarounds below in the meantime.

How do I detect CVE-2017-12149 across my infrastructure?

Inventory every redhat jboss enterprise application platform deployment and check each version against the affected-products list above.

How do I mitigate CVE-2017-12149 if there is no patch (or I can't update yet)?

Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Is CVE-2017-12149 actively exploited in the wild?

Yes. There are 13 known exploit references for CVE-2017-12149, including 8 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2017-12149?

CVE-2017-12149 has an EPSS (Exploit Prediction Scoring System) score of 90.7%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2017-12149 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2017-12149 (Red Hat JBoss Application Server Remote Code Execution Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2021-12-10. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-06-10. The required action was: Apply updates per vendor instructions. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2017-12149?

CVE-2017-12149 is classified as Deserialization of Untrusted Data (CWE-502). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2017-12149?

CVE-2017-12149 affects redhat jboss enterprise application platform (8 versions, e.g. 5.0.0, 5.0.1, 5.1.0…). Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2017-12149?

A Nuclei detection template exists for CVE-2017-12149, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2017-12149 published, and has it been updated?

CVE-2017-12149 was published on October 4, 2017 and was last updated on October 7, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

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CISA KEV · ACTIVELY EXPLOITED

CRITICAL severity

CVE-2017-12149 — Jboss Enterprise Application Platform

CRITICAL

CVE-2017-12149 is a critical-severity (CVSS 9.8) Deserialization of Untrusted Data vulnerability in redhat jboss enterprise application platform. It is in CISA's Known Exploited Vulnerabilities catalog (added 2021-12-10) and has been used in ransomware campaigns — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

In Jboss Application Server as shipped with Red Hat Enterprise Application Platform 5.2, it was found that the doFilter method in the ReadOnlyAccessFilter of the HTTP Invoker does not…

Published

Oct 4, 2017

Updated

Oct 7, 2026

Affected

1 product

Patched

See advisory

Exploits

13 known

Exploitation data as of Oct 22, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2021-12-10 — including use in ransomware campaigns. Federal agencies were required to remediate by 2022-06-10.
CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2017-12149.

EPSS Exploitation Probability

via FIRST.org ↗

90.7%probability of exploitation in next 30 days

Very High Risk0.00%

Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2017-12149 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 394,415 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.

Description

In Jboss Application Server as shipped with Red Hat Enterprise Application Platform 5.2, it was found that the doFilter method in the ReadOnlyAccessFilter of the HTTP Invoker does not restrict classes for which it performs deserialization and thus allowing an attacker to execute arbitrary code via crafted serialized data.

Affected Products

1 product · 9 configurations

Application

jboss enterprise application platformredhat

8 versions

5.0.05.0.15.1.05.1.15.1.25.2.05.2.15.2.2

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.