Property
Language	java
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	High
Impact Level	High
Likelihood Level	Low

Description

The code allows XML documents to include DOCTYPE declarations without disabling external entity processing. This means XML parsers can load external resources defined in the XML, which is insecure.

Impact

If exploited, an attacker could use XML External Entity (XXE) attacks to read sensitive files from the server, perform denial-of-service (DoS), or make network requests to internal resources, potentially exposing confidential data and compromising system integrity.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Medium
Impact Level	Medium
Likelihood Level	Medium

Description

The application passes user-supplied data directly to the XML parser (using node-expat) without proper validation or sanitization. This can allow attackers to craft malicious XML that the parser processes unsafely.

Impact

If exploited, attackers could read sensitive files from your server, access internal resources, or trigger denial of service by abusing XML External Entity (XXE) processing. This can lead to data breaches, information leakage, or service disruption.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Medium
Impact Level	Medium
Likelihood Level	Medium

Description

User-supplied data is being passed directly to the xml2json XML parser in your Express application without proper validation or sanitization. This can allow attackers to inject malicious XML content, leading to XML External Entity (XXE) vulnerabilities.

Impact

If exploited, attackers could read sensitive files from your server, perform server-side request forgery (SSRF), or cause denial of service. This could expose confidential information, compromise server integrity, or be used as a foothold for further attacks against your application or infrastructure.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	High
Impact Level	High
Likelihood Level	High

Description

User-provided XML input is being parsed with the libxml library while the ’noent’ option is set to true. This setting allows external entities within the XML to be processed, opening the door to XML External Entity (XXE) attacks.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Medium
Impact Level	High
Likelihood Level	Medium

Description

User-supplied data is being parsed as XML by the xml2json library within an Express route handler without validation. This can allow attackers to craft malicious XML input that is processed by your server.

Impact

If exploited, attackers could read sensitive files from your server, perform server-side request forgery (SSRF), or cause denial of service. This can lead to data breaches, unauthorized access, or disruption of service, putting your application and its users at significant risk.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Low
Impact Level	High
Likelihood Level	Low

Description

The parseXml() function is being used with the ’noent’ option set to true, which allows external entities in XML to be processed. If untrusted or user-supplied XML data is parsed this way, it can expose the application to XML External Entity (XXE) attacks.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Low
Impact Level	Low
Likelihood Level	Low

Description

Untrusted user input is being passed directly to the xml2json XML parser without validation or sanitization, which can allow processing of dangerous XML content. This makes the application vulnerable to XML External Entity (XXE) attacks.

Impact

If exploited, an attacker could access sensitive files on the server, perform server-side request forgery (SSRF), or disrupt application behavior by injecting malicious XML. This can lead to data leaks, unauthorized access, or compromise of backend systems.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Low
Impact Level	Low
Likelihood Level	Low

Description

Handling the ‘ondoctype’ event in the ‘sax’ XML parser can introduce XML External Entity (XXE) vulnerabilities if external entities are processed from untrusted sources. This can happen if custom DTD entity definitions are implemented without proper security controls.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Low
Impact Level	Medium
Likelihood Level	Low

Description

Parsing XML input from users with the ’node-expat’ library without proper validation or disabling external entities can expose your code to XML External Entity (XXE) attacks. This happens when untrusted XML data is processed without restrictions.

Impact

If exploited, attackers could read sensitive files from your server, perform server-side request forgery (SSRF), or potentially execute denial-of-service attacks. This can lead to data breaches, unauthorized access to internal resources, and compromise of the application’s security.

Property
Language
Severity
CWE	CWE-611: Improper Restriction of XML External Entity Reference
OWASP	A04:2017 - XML External Entities (XXE)
Confidence Level	Medium
Impact Level	Medium
Likelihood Level	Low

Description

Parsing untrusted XML data using Python’s built-in xml library can expose your application to XML External Entity (XXE) attacks. This occurs because the default parser does not securely handle external entities, making it unsafe for untrusted input.

Impact

If exploited, attackers could read sensitive files from your server, perform server-side request forgery (SSRF), or trigger denial-of-service attacks with malicious XML payloads. This can lead to data breaches, system downtime, and compromise of internal systems.