How severe is CVE-2013-2186?

No CVSS score has been assigned to CVE-2013-2186 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2013-2186?

CVE-2013-2186 affects the following packages: commons-fileupload:commons-fileupload (Maven). Ecosystems affected: Maven.

How do I fix CVE-2013-2186?

Update commons-fileupload:commons-fileupload to 1.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-2186 is resolved across your whole dependency graph.

How do I detect CVE-2013-2186 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for commons-fileupload:commons-fileupload, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2013-2186 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2013-2186 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2013-2186, including 1 in-the-wild exploitation 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-2013-2186?

CVE-2013-2186 has an EPSS (Exploit Prediction Scoring System) score of 12.7%, placing it in the 96th 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. This score warrants monitoring and prompt remediation.

What type of vulnerability is CVE-2013-2186?

CVE-2013-2186 is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2013-2186 published, and has it been updated?

CVE-2013-2186 was published on October 28, 2013 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2013-2186 — commons-fileupload

Fix: apache/commons-fileupload@163a606

CVE-2013-2186 is a Improper Input Validation vulnerability in commons-fileupload:commons-fileupload. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for commons-fileupload:commons-fileupload — see the affected versions and patch details below.

Arbitrary file write in Apache Commons Fileupload

Also known asGHSA-qx6h-9567-5fqw

Published

Oct 28, 2013

Updated

Apr 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

2 known

Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

12.7%probability of exploitation in next 30 days

Moderate Risk0.00%

Lower risk than most CVEs96th percentile — riskier than 96% of all scored CVEsHighest risk

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

Real-World Exposure

1 pkg affected

☕commons-fileupload:commons-fileupload

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

The DiskFileItem class in Apache Commons FileUpload, as used in Red Hat JBoss BRMS 5.3.1; JBoss Portal 4.3 CP07, 5.2.2, and 6.0.0; and Red Hat JBoss Web Server 1.0.2 allows remote attackers to write to arbitrary files via a NULL byte in a file name in a serialized instance.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`commons-fileupload:commons-fileupload`	all versions	1.3.1`commons-fileupload:commons-fileupload:1.3.1`

Affected Products

5 products · 7 configurations

Application

jboss enterprise brms platformredhat

1 version

5.3.1

Application

jboss enterprise portal platformredhat

3 versions

4.3.05.2.26.0.0

Application

jboss enterprise web serverredhat

1 version

1.0.2

Application

openshiftredhat

≤ 3.1

range

ubuntuubuntu

1 version

10.04

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.

The DiskFileItem class in Apache Commons FileUpload, as used in Red Hat …

github.comGithubFeb 2016

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for commons-fileupload:commons-fileupload, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update commons-fileupload:commons-fileupload to 1.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-2186 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

Product	Fixed in	Advisory
JBoss Enterprise BRMS Platform 5.3	see advisory	RHSA-2013:1430
Red Hat JBoss Enterprise Web Server 1 for RHEL 5	`jakarta-commons-fileupload-1:1.1.1-7.7.ep5.el5`	RHSA-2013:1428
Red Hat JBoss Operations Network 3.1	see advisory	RHSA-2013:1448
Red Hat JBoss SOA Platform 4.3	see advisory	RHSA-2013:1442
Red Hat JBoss Web Server 1.0	see advisory	RHSA-2013:1429
Red Hat OpenShift Enterprise 3.1	`atomic-openshift-0:3.1.1.6-1.git.0.b57e8bd.el7aos`	RHSA-2016:0070

Ubuntu

USN-2029-1Ubuntu

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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CVE-2013-2186 — commons-fileupload

EPSS Exploitation Probability

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2013-2186 in your dependencies?