How severe is CVE-2016-6348?

CVE-2016-6348 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2016-6348?

CVE-2016-6348 affects the following packages: org.jboss.resteasy:resteasy-client (Maven). Ecosystems affected: Maven.

How do I fix CVE-2016-6348?

Update org.jboss.resteasy:resteasy-client to 3.0.20.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-6348 is resolved across your whole dependency graph.

How do I detect CVE-2016-6348 in my Maven dependencies?

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

How do I mitigate CVE-2016-6348 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2016-6348 actively exploited in the wild?

No public exploit code has been indexed for CVE-2016-6348 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-2016-6348?

CVE-2016-6348 has an EPSS (Exploit Prediction Scoring System) score of 1.6%, placing it in the 75th 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 indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2016-6348?

CVE-2016-6348 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2016-6348 published, and has it been updated?

CVE-2016-6348 was published on April 12, 2017 and was last updated on March 14, 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

MEDIUM severity

CVE-2016-6348 — resteasy-client

MEDIUM

CVE-2016-6348 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in org.jboss.resteasy:resteasy-client. A fix is available for org.jboss.resteasy:resteasy-client — see the affected versions and patch details below.

JacksonJsonpInterceptor susceptible to cross-site script inclusion (XSSI) attack

Also known asGHSA-9xfc-j5mf-9w5p

Published

Apr 12, 2017

Updated

Mar 14, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

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

EPSS Exploitation Probability

via FIRST.org ↗

1.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs75th percentile — riskier than 75% of all scored CVEsHighest risk

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

☕org.jboss.resteasy:resteasy-client

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

JacksonJsonpInterceptor in RESTEasy might allow remote attackers to conduct a cross-site script inclusion (XSSI) attack.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.jboss.resteasy:resteasy-client`	all versions	3.0.20.Final`org.jboss.resteasy:resteasy-client:3.0.20.Final`

Affected Products

1 product · 1 configurations

Application

resteasyredhat

all

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jboss.resteasy:resteasy-client, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.jboss.resteasy:resteasy-client to 3.0.20.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-6348 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

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.

UbuntuMEDIUM

USN-7630-1Ubuntu

Frequently Asked Questions

JacksonJsonpInterceptor in RESTEasy might allow remote attackers to conduct a cross-site script inclusion (XSSI) attack.

O3 Security · Impact-Aware SCA

Is CVE-2016-6348 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

Resteasy

4.5/10

Code-Review0/10

Maintained10/10

Branch-ProtectionN/A

Assessed Oct 19, 2026

Timeline

Disclosed

Apr 12, 2017

Last updated

Mar 14, 2026

Identifiers

CVE-2016-6348

GHSA-9xfc-j5mf-9w5p

References

Advisorynvd.nist.gov · CVE 2016 6348 Reportbugzilla.redhat.com · show bug.cgi Packagegithub.com · Resteasy

Related vulnerabilities

Also affects resteasy-client

This CVE is medium severity; 6 of 6 other CVEs affecting resteasy-client are rated as high or higher (top: high).

CVE-2020-1695CVE-2016-6347CVE-2016-6345CVE-2012-0818CVE-2014-3490CVE-2020-25633

Same weakness: CWE-79

This CVE is medium severity; 2 of 2 other CVEs with CWE-79 are rated as high or higher (top: critical).

CVE-2026-113787CVE-2026-44267Browse all CWE-79

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedMar 14, 2026