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CVE-2013-4221

20
FAUCET Score

CVE-2013-4221 describes a critical deserialization vulnerability in Restlet versions prior to 2.1.4, specifically within the ObjectRepresentation class. This flaw allows remote, unauthenticated attackers to execute arbitrary Java code by sending specially crafted XML, leveraging the Java XMLDecoder's default behavior of deserializing untrusted objects. With a CVSS score of 7.5, this vulnerability presents a high risk due to its network-based attack vector and low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for remote code execution necessitates prompt patching.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.1.3CPE matchmatch criteria
cpe:2.3:a:restlet:restlet:*:*:*:*:*:*:*:*
2.1CPE matchmatch criteria
cpe:2.3:a:restlet:restlet:2.1:milestone1:*:*:*:*:*:*
2.1CPE matchmatch criteria
cpe:2.3:a:restlet:restlet:2.1:milestone2:*:*:*:*:*:*
2.1CPE matchmatch criteria
cpe:2.3:a:restlet:restlet:2.1:milestone3:*:*:*:*:*:*
2.1CPE matchmatch criteria
cpe:2.3:a:restlet:restlet:2.1:milestone4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.95%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0295 is in the 74th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.restlet.jse:org.restletFixed in: 2.1.4

Vendor Advisories (1)

mavenGHSA-92j2-5r7p-6hjwhigh

Restlet is vulnerable to Arbitrary Java Code Execution via crafted XML

May 17, 2022

References

blog.diniscruz.com / 2013/08/using-xmldecoder-to-execute-server-side.html
Third Party Advisory
restlet.org / learn/2.1/changes
Release NotesVendor Advisory
rhn.redhat.com / errata/RHSA-2013-1410.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2013-1862.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / restlet/restlet-framework-java/issues/774
Issue TrackingPatch