CVE-2013-0431

Exploited in the wild. In CISA KEV since 2022‑05‑25. A vendor fix is available.

CVSS 3.15.3Medium EPSS percentile99th90% chance in 30 days CISA KEVListedsince 2022-05-25, due 2022-06-15
No public exploit known FixVendor fixNo build named by the sources

Published 2013-01-31Updated 2026-08-14Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

Steps

Written by AI from the record

Check whether any computers or servers run Java Runtime Environment 7 through Update 11 or OpenJDK 7.
Upgrade Oracle Java SE 7 to Update 13 or later; for OpenJDK 7, install the security update supplied by your operating-system vendor.
Remove Java 7 where it is no longer required, especially from employee computers.
Ask IT to check for suspicious Java activity on systems that were unpatched.

Vendor advisory Some work to apply

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 through Update 11, and OpenJDK 7, allows user-assisted remote attackers to bypass the Java security sandbox via unspecified vectors related to JMX, aka "Issue 52," a different vulnerability than CVE-2013-1490.

In plain language

Written by AI from the record

Businesses using Java Runtime Environment 7 through Update 11, or OpenJDK 7, should act now because criminals have used this flaw to get around Java’s built-in safety controls.

User-assisted sandbox bypass in JRE/OpenJDK 7 related to JMX, enabling remote attackers to escape Java security restrictions through unspecified vectors.

If you're affected

Malware installation risk
Ransomware exposure
Data theft risk
Business disruption

What is it

Java normally places downloaded Java content behind a safety barrier. This flaw can let a person who is tricked into opening malicious content help an attacker slip past that barrier, like a visitor being allowed through a building’s reception desk with a forged pass.

Who is affected

This matters to you if you use or run Java Runtime Environment 7 on employee computers, servers, or business applications. It is especially relevant where staff can open Java content from outside sources; an attacker needs a user to interact with malicious content.

How urgent is it

Attackers are already exploiting this flaw in ransomware campaigns. Treat this as urgent: the U.S. government required affected federal agencies to remediate it by June 15, 2022, and any remaining unpatched Java 7 installation should be addressed now.

What to do — in detail

Confirm exposure by inventorying installed Java runtimes on endpoints and servers, including application-bundled runtimes, and identify Oracle Java SE 7 through Update 11 and OpenJDK 7 installations. For Oracle Java SE 7, target Update 13 or later; for OpenJDK 7, use the patched package released by the operating-system vendor, since the supplied findings do not provide a single fixed package version for every distribution.

Test the update with applications that depend on Java before broad deployment. If an application cannot be updated promptly, remove or disable its Java browser integration where possible, restrict use of that system to trusted content, and isolate it from untrusted web access. CISA’s KEV remediation due date was 2022-06-15.

Monitor endpoint and web-filtering records for users opening unexpected Java content, unusual Java process launches, and follow-on malware activity on previously exposed systems.

Technical context

CVSS 3.1 score: 5.3 (Medium). The reported weakness is an unspecified Java security-sandbox bypass associated with JMX (CWE-693; NVD-CWE-Other). The technical description identifies a user-assisted remote attack path. CISA KEV lists the vulnerability as exploited in ransomware campaigns, which confirms real-world exploitation; no public exploit code is on record. EPSS is high and flat, but its percentage is omitted because confirmed exploitation takes precedence.

This is a general assessment based on public vulnerability data. It does not account for your specific infrastructure — when in doubt, consult a security specialist.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS99th

CISA KEV

Listed as exploited in the wild since 2022-05-25.

US federal agencies must remediate by 2022-06-15.

Known use in ransomware campaigns.

Apply updates per vendor instructions.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

90% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

11 events over 4978 days, from the signal feeds we watch.

2026-09-18EPSS band changehigh → criticalepss band change
2026-08-14Patch availablerecord updated
2026-06-25OpenVAS check added
2026-06-22EPSS band changecritical → high
2026-04-21Patch availablerecord updated
2022-05-25Added to CISA KEVransomware campaign

Affected products

Oracle Corp.commercial · USaka oracle
- Java Runtime EnvironmentLibraryLibraryOSS Libraries / generic-library
- jreLibraryOSS Libraries / generic-library
- openjdkLibraryLibraryOSS Libraries / generic-library
Red Hat Inc.commercial · USaka red hat
- Red Hat Enterprise Linux Server EUSOSOn-premOperating Systems / linux-distro
- Red Hat Enterprise Linux WorkstationOn-premOperating Systems / linux-distro

And 3 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Scored 5.3 by NVD.

How it is reached

Attack Vector NetworkExploitable remotely over the network without any special conditions
Attack Complexity LowNo special conditions — the attack can be reliably reproduced
Privileges Required NoneNo authentication required — anyone can exploit this
User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

Confidentiality LowSome restricted information is disclosed, but limited in scope
Integrity NoneNo integrity impact
Availability NoneNo availability impact

Weaknesses

Sources

References in the record

And 21 more references. See all after sign-in

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