What is CVE-2017-12149?

CVE-2017-12149 is a critical-severity vulnerability in Red Hat, Inc. Jbossas, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2017-10-04.

How severe is CVE-2017-12149?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2017-12149 known to be exploited?

Yes. CVE-2017-12149 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-12-10), indicating it is being actively exploited. 142 public proof-of-concept repositories are indexed.

Deserialization in Red Hat, Inc. Jbossas

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.

Vulnerability class: Insecure Deserialization

Published 2017-10-04 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.907 (99.8th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.907 · newest: 0.907 · change: 0.000

Affected products

Red Hat, Inc. Jbossas
Red Hat Jboss Enterprise Application Platform — versions 5.0.0, 5.0.1, 5.1.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-12-10. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-10.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

bugzilla.redhat.com/show_bug.cgi (Issue Tracking)
access.redhat.com/errata/RHSA-2018:1608 (vendor-advisory, Third Party Advisory)
github.com/gottburgm/Exploits/tree/master/CVE-2017-12149 (Third Party Advisory)
www.securityfocus.com/bid/100591 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
access.redhat.com/errata/RHSA-2018:1607 (vendor-advisory, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2017-12149?: CVE-2017-12149 is a critical-severity vulnerability in Red Hat, Inc. Jbossas, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2017-10-04.
How severe is CVE-2017-12149?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2017-12149 known to be exploited?: Yes. CVE-2017-12149 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-12-10), indicating it is being actively exploited. 142 public proof-of-concept repositories are indexed.