CVE-2024-8010: XML External Entity (XXE) Vulnerability

CVE-2024-8010 Overview

CVE-2024-8010 is an XML External Entity (XXE) injection vulnerability affecting a component that accepts XML input through the publisher without disabling external entity resolution. This allows malicious actors to submit a crafted XML payload that exploits the unescaped external entity references.

By leveraging this vulnerability, a malicious actor can read confidential files from the product's file system or access limited HTTP resources reachable via HTTP GET requests to the vulnerable product.

Critical Impact

Attackers with adjacent network access can exploit this XXE vulnerability to exfiltrate sensitive files and perform limited Server-Side Request Forgery (SSRF) attacks against internal resources.

Affected Products

• WSO2 Products (see WSO2 Security Advisory WSO2-2024-3581 for specific affected versions)

Discovery Timeline

• 2026-04-16 - CVE CVE-2024-8010 published to NVD
• 2026-04-16 - Last updated in NVD database

Technical Details for CVE-2024-8010

Vulnerability Analysis

This vulnerability is classified as CWE-611 (Improper Restriction of XML External Entity Reference), commonly known as XXE injection. The flaw exists in the XML parsing functionality of the publisher component, which fails to properly configure the XML parser to disable external entity resolution.

When an XML parser processes an XML document containing a reference to an external entity, it attempts to resolve that entity by accessing an external resource. In a secure configuration, external entity resolution should be disabled. However, in this case, the parser follows the external entity references, allowing attackers to craft malicious XML payloads that can access local files or make HTTP requests to internal systems.

The attack requires adjacent network access and low-level privileges, limiting the scope of potential attackers to those who have already gained some foothold within the local network segment.

Root Cause

The root cause of CVE-2024-8010 is the improper configuration of the XML parser used by the publisher component. The parser accepts XML documents with Document Type Definitions (DTDs) that define external entities, and the application fails to set the appropriate parser features to disable external entity processing.

Specifically, the XML parser should have properties such as disallow-doctype-decl, external-general-entities, and external-parameter-entities set to disable external entity resolution, but these safeguards were not implemented.

Attack Vector

The attack vector for this vulnerability requires adjacent network access, meaning the attacker must be on the same network segment as the vulnerable system. The attacker submits a specially crafted XML payload to the publisher component containing malicious external entity references.

A typical XXE exploitation scenario involves defining an external entity that references a local file path (such as /etc/passwd on Linux systems or C:\Windows\win.ini on Windows). When the XML parser processes this payload, it resolves the external entity and includes the contents of the referenced file in the parsed output, which may then be returned to the attacker.

For SSRF-style attacks, the external entity can reference an internal HTTP endpoint, causing the server to make requests to internal services that would otherwise be unreachable from the external network.

The vulnerability allows confidential file disclosure and limited HTTP resource access, but the impact is constrained by the read-only nature of the attack and the requirement for adjacent network positioning.

Detection Methods for CVE-2024-8010

Indicators of Compromise

• Unusual XML payloads containing <!DOCTYPE> declarations with ENTITY definitions in application logs
• XML requests containing file path references such as file:///etc/passwd or Windows system paths
• Unexpected outbound HTTP GET requests from the application server to internal resources
• Error messages or responses containing file system contents or internal network information

Detection Strategies

• Monitor and analyze XML input to the publisher component for suspicious DTD declarations and external entity references
• Implement Web Application Firewall (WAF) rules to detect and block XXE attack patterns in incoming XML payloads
• Review application logs for anomalous XML processing errors or unexpected file access attempts
• Deploy network monitoring to identify unusual HTTP requests originating from the vulnerable component

Monitoring Recommendations

• Enable verbose logging for XML parsing operations to capture detailed information about processed documents
• Set up alerts for access attempts to sensitive file paths from the application context
• Monitor for any changes in outbound network traffic patterns from the affected server
• Implement file integrity monitoring on sensitive configuration files that could be targeted

How to Mitigate CVE-2024-8010

Immediate Actions Required

• Apply the security patch provided by WSO2 as outlined in the WSO2 Security Advisory WSO2-2024-3581
• Review and restrict network access to the vulnerable component to minimize exposure
• Implement input validation to sanitize XML payloads before processing
• Consider deploying a WAF with XXE detection capabilities as an additional defense layer

Patch Information

WSO2 has released a security advisory addressing this vulnerability. Refer to the WSO2 Security Advisory WSO2-2024-3581 for detailed patch information, affected versions, and upgrade instructions specific to your deployment.

Workarounds

• Disable DTD processing entirely in the XML parser configuration if the application does not require DTD support
• Configure the XML parser to disable external entity resolution by setting appropriate security features
• Implement network segmentation to limit adjacent network access to the vulnerable component
• Use XML schema validation to reject documents containing external entity references

# Example XML parser hardening (Java)
# Set these features on your XML parser factory:
# factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
# factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
# factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);