How severe is CVE-2017-12149?

CVE-2017-12149 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-12149 being actively exploited?

Yes. CVE-2017-12149 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-12-10, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2017-12149?

CVE-2017-12149 primarily affects Redhat Jboss Enterprise Application Platform. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-12149?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2017-12149 have an EU (EUVD) identifier?

Yes. CVE-2017-12149 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-3733. It is also flagged as exploited in the EUVD (since 2021-12-10).

When was CVE-2017-12149 published?

CVE-2017-12149 was published on 2017-10-04 and last updated on 2026-08-13.

CVE-2017-12149

CVE-2017-12149 is a critical-severity vulnerability in Redhat Jboss Enterprise Application Platform with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-12-10). The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 91% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-12-10)
EU (EUVD) id: EUVD-2017-3733
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-12-10)
Weakness: CWE-502
Affected product: Redhat Jboss Enterprise Application Platform
Published: 2017-10-04
Last modified: 2026-08-13

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.

Frequently asked questions

What is CVE-2017-12149?: 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.
How severe is CVE-2017-12149?: CVE-2017-12149 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-12149 being actively exploited?: Yes. CVE-2017-12149 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-12-10, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2017-12149?: CVE-2017-12149 primarily affects Redhat Jboss Enterprise Application Platform. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-12149?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2017-12149 have an EU (EUVD) identifier?: Yes. CVE-2017-12149 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-3733. It is also flagged as exploited in the EUVD (since 2021-12-10).
When was CVE-2017-12149 published?: CVE-2017-12149 was published on 2017-10-04 and last updated on 2026-08-13.

References

Affected products (9)

cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.1.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.1.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.1.2:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.2.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:5.2.2:*:*:*:*:*:*:*

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