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CVE-2016-4311

39
FAUCET Score

CVE-2016-4311 describes a Cross-Site Request Forgery (CSRF) vulnerability in the XACML flow feature of WSO2 Identity Server 5.1.0. This flaw allows remote attackers to hijack the authentication of privileged users by tricking them into processing malicious XACML requests. With a CVSS score of 8.8 (HIGH), the vulnerability has a low attack complexity and can lead to high impacts on confidentiality, integrity, and availability if exploited. While no active exploitation or Metasploit/Nuclei modules are reported, an ExploitDB entry (EDB-40239) exists, indicating public exploit code availability. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
5.1.0CPE matchmatch criteria
cpe:2.3:a:wso2:identity_server:5.1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.38%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-40239 · Aug 16, 2016
This CVE's current EPSS score of 0.0338 is in the 87th percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

hyp3rlinx.altervista.org / advisories/WSO2-IDENTITY-SERVER-v5.1.0-XML-External-Entity.txt
ExploitThird Party Advisory
packetstormsecurity.com / files/138329/WSO2-Identity-Server-5.1.0-XML-Injection.html
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/40239
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / archive/1/539199/100/0/threaded
securityfocus.com / bid/92485
Third Party AdvisoryVDB Entry
docs.wso2.com / display/Security/Security+Advisory+WSO2-2016-0096
PatchVendor Advisory