How severe is CVE-2013-6407?

No CVSS score has been assigned to CVE-2013-6407 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2013-6407?

CVE-2013-6407 affects the following packages: org.apache.solr:solr-core (Maven). Ecosystems affected: Maven.

How do I fix CVE-2013-6407?

Update org.apache.solr:solr-core to 4.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-6407 is resolved across your whole dependency graph.

How do I detect CVE-2013-6407 in my Maven dependencies?

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

How do I mitigate CVE-2013-6407 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-2013-6407 actively exploited in the wild?

No public exploit code has been indexed for CVE-2013-6407 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2013-6407?

CVE-2013-6407 has an EPSS (Exploit Prediction Scoring System) score of 11.4%, 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.

When was CVE-2013-6407 published, and has it been updated?

CVE-2013-6407 was published on December 7, 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-2013-6407 — solr-core

Fix: apache/lucene-solr@f230486

CVE-2013-6407 is a security vulnerability in org.apache.solr:solr-core. EPSS puts its 30-day exploitation probability at 11.4% (96th percentile). A fix is available for org.apache.solr:solr-core — see the affected versions and patch details below.

Apache Solr UpdateRequestHandler for XML resolves XML External Entities

Also known asGHSA-998j-j6v9-5846

Published

Dec 7, 2013

Updated

Apr 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

11.4%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

☕org.apache.solr:solr-core

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 UpdateRequestHandler for XML in Apache Solr before 4.1 allows remote attackers to have an unspecified impact via XML data containing an external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.solr:solr-core`	all versions	4.1.0`org.apache.solr:solr-core:4.1.0`

Affected Products

1 product · 6 configurations

Application

solrapache

≤ 4.0.0

4 versions

3.6.03.6.13.6.24.0.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.solr:solr-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.solr:solr-core to 4.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-6407 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 HatModerate

Product	Fixed in	Advisory
Red Hat JBoss Data Grid 6.2	`solr`	RHSA-2014:0029
Red Hat JBoss Web Framework Kit 2.4	`solr`	RHSA-2013:1844

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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