Weakness (CWE)
CWE-91: XML Injection
The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system.
More detail
Within XML, special elements could include reserved words or characters such as "<", ">", """, and "&", which could then be used to add new data or modify XML syntax.
How to prevent it (1 mitigation)
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Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Source: MITRE CWE-91
116 results · Feed
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Low 2.1
XML injection in Saxy via unescaped CDATA section terminator
XML injection in the Saxy XML encoder. Saxy.Encoder.cdata/1 serializes a {:cdata, characters} node by wrapping the supplied characters between <![CDATA[ and ]]> and passing the payload through byte for byte. The encoder's character-data and attribute-value pa…
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Low 2.1
Processing instruction target and content emitted unescaped in Saxy encoder allows XML injection
Saxy's XML encoder writes the target and the content of a processing instruction into the output document verbatim, without validation or escaping. The encoder builds the construct by concatenating both fields between <? and ?>, so neither field is checked ag…
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Low 2.1
XML comment injection in Saxy encoder via unescaped double hyphen
XML injection in the encoder of Saxy. Saxy.Encoder does not neutralize the -- sequence in XML comment content: escape_comment/2 returns the comment binary unchanged in every clause and only appends a space when the comment ends in a single -, so neither an in…
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High 7.1CVE-2026-53582 Public exploit
OPNsense: XPATH Injection can disclose any secret in config.xml
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.10, the Trust module stores attacker-controlled certificate authority and certificate refid values and interpolates them into XPath expressions in src/opnsense/mvc/app/models/OPN…
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High 8.1
Junos OS: SRX Series: An attacker causes arbitrary configuration commit when the custom URL-feed feature is used
An XML Injection vulnerability in the Unified Threat Management daemon (utmd) of Juniper Networks Junos OS on SRX Series devices allows an unauthenticated network attacker to commit arbitrary device configuration with root privileges via a malicious response …
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High 7.1
Adobe Experience Manager | XML Injection (aka Blind XPath Injection) (CWE-91)
Adobe Experience Manager is affected by an XML Injection (aka Blind XPath Injection) vulnerability that could result in a Security feature bypass. A low-privileged attacker could leverage this vulnerability to bypass security measures and gain unauthorized re…
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High 7.2
Kiteworks Email Protection Gateway Path Traversal
-A weakness could have allowed an authenticated Kiteworks Email Protection Gateway administrator to write a file outside its intended location and cause the application to execute it, potentially resulting in remote code execution as the underlying service ac…
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Critical 9.8
EasyTimeline should not serve image maps as application/xml
XML injection (aka blind XPath injection) vulnerability in The Wikimedia Foundation Mediawiki - EasyTimeline extension allows XML Injection. This issue affects Mediawiki - EasyTimeline extension: before 1.46.1, 1.45.5, 1.43.10.
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High 7.7
XML Injection vulnerability
ZohoCorp ManageEngine OpManager and Firewall Analyzer versions 12.8.709 and below were vulnerable to an XML Injection vulnerability in the Rule Tracking Compare Policies feature.
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Medium 5.9
NVIDIA Infrastructure Controller for Linux contains a vulnerability where an attacker could cause an XML injection. A s…
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Medium 6.1
WWBN AVideo XML Injection via plugin/AD_Server/VMAP.php
WWBN AVideo at commit c3edcc274c389816d434acadac07ee78eaf330c1 and earlier contains an XML injection vulnerability in plugin/AD_Server/VMAP.php, which is reachable without authentication when the AD_Server plugin is enabled. The script emits Content-Type: app…
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High 7.8
IBM webMethods Integration Server is vulnerable to an XML external entity injection (XXE) attack when processing XML data
IBM webMethods Integration Server 11.1 IBM webMethods Integration is vulnerable to an XML external entity injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory res…
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High 8.7
xmldom: requireWellFormed DocType publicId/systemId validation is bypassable via an embedded line terminator
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.10 until 0.9.12, the requireWellFormed: true serializer validates DocumentType.publicId and DocumentType.systemId with PubidLiteral_match and Sy…
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High 8.7
xmldom: requireWellFormed element/attribute name validation is bypassable via an embedded line terminator
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.11 until 0.9.12, the requireWellFormed: true element and attribute name checks use the anchored QName_exact expression produced by reg() in lib/…
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High 8.7
xmldom: Processing Instruction Target Injection Bypasses requireWellFormed
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, Document.createProcessingInstruction(target, data) in lib/do…
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High 8.7
xmldom: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0 until 0.9.12, the shared reg() builder in lib/grammar.js compiles the anchored QName_exact validator with the multiline flag, so ^ and $ valid…
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High 8.7
xmldom: DocType `name` Injection Bypasses requireWellFormed
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, the DOCUMENT_TYPE_NODE branch in lib/dom.js validates public…
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High 8.7
xmldom: Element name injection via createElement() bypasses requireWellFormed
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Document.createElement(tagName) stores an unvalidated elemen…
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High 8.7
xmldom: Attribute name injection via setAttribute() bypasses requireWellFormed
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Element.setAttribute() calls the private _createAttribute(na…
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Low 2.1
Element and Attribute Names Injected Verbatim into XML Output in xml_builder
XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, XML Injection. This vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilde…
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Low 2.1
CDATA Section Breakout via Unsanitised ]]> in xml_builder
XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, XML Injection. This vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilde…
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Medium 4.9
Wildfly-core: wildfly core: denial of service via malformed payload injection by an authenticated administrative user.
A flaw was found in wildfly-core. A remote user authenticated as an administrative user can inject a malformed payload into the Inet Address field through the Management Model. This injection causes the server to crash and become unrecoverable, as the payload…
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Medium 4.3
@astrojs/rss: XML Injection via Unescaped RSS Feed Fields
Astro is a web framework for content-driven websites. In versions 1.0.0 through 4.0.18, the source.title and enclosure.type item fields in packages/astro-rss/src/index.ts are interpolated directly into XML template strings without XML-character escaping befor…
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Low 2.9
XML injection vulnerability in QDom comment, CDATA and processing-instruction serialization
Improper output neutralization (XML injection) in QDom comment, CDATA, and processing-instruction serialization in Qt XML from 4.0.0 through 6.11 allows untrusted text serialized by an application into those nodes to inject arbitrary XML markup, because the n…
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High 8.5
Logto: SAML IdP injects user-controlled profile attributes raw into signed assertions, allowing privilege escalation at relying Service Providers
Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 1.41.0, Logto's self-hosted SAML application IdP built the signed SAML response and assertion by string-substituting user-controlled profile attributes such as name, email, an…
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Medium 5.8
guzzlehttp/guzzle-services' XML Request Serialization Vulnerable to XML Injection via CDATA Terminator
Guzzle Services provides an implementation of the Guzzle Command library that uses Guzzle service descriptions to describe web services, serialize requests, and parse responses into easy to use model structures. Versions prior ro 1.5.4 do not safely serialize…
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High 8.7CVE-2026-46490 Public exploit
samlify: XML Injection in AttributeValue Allows Privilege Escalation in Signed SAML Assertions
samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify’s template substitution only escapes attribute contexts. Values inserted into element text (e.g., <saml:AttributeValue>) are not escaped. A normal user can inject XML marku…
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High 8.1
Inappropriate implementation in XML in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to inject arbitra…
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Medium 6.5
pam_usb: XPath injection via PAM-supplied identifiers in pam_usb configuration queries
pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, pam_usb builds XPath expressions from user-supplied identifiers (PAM username, service name) and device-supplied identifiers (USB device serial, model, vendor) …
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High 8.7
authentik: SAML NameID XML Comment Injection Enables Authentication Bypass via Identifier Truncation
authentik is an open-source identity provider. Versions 2025.12.4 and prior, and versions 2026.2.0-rc1 through 2026.2.2 were vulnerable to Authentication Bypass through SAML NameID XML Comment Injection. Due to how authentik extracted the NameID value from a …
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Medium 6.1
fast-xml-builder: Comment Value bypass regex
fast-xml-builder builds XML from JSON. In 1.1.5, the fix for CVE-2026-41650 in fast-xml-parser sanitizes -- sequences in XML comment content using .replace(/--/g, '- -'). This skip the values containing three consecutive dashes (e.g., --->...), allowing an at…
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Medium 6.1
fast-xml-builder: Attribute values with unwanted quotes can bypass malicious or unwanted attributes
fast-xml-builder builds XML from JSON. Prior to 1.1.7, when an input data has quotes in attribute values but process entities is not enabled, it breaks the attribute value into multiple attributes. This gives the room for an attacker to insert unwanted attrib…
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Medium 6.1
fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters
fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. Prior to version 5.7.0, XMLBuilder does not escape the "-->" sequence in comment content or the "]]>" sequence in CDATA sections when building XML from Java…
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High 8.7
xmldom: XML node injection through unvalidated processing instruction serialization
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In @xmldom/xmldom prior to versions 0.9.10 and 0.8.13 and xmldom version 0.6.0 and prior, the package allows attacker-controlled processing instructi…
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High 8.7
xmldom: XML injection through unvalidated DocumentType serialization
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In @xmldom/xmldom prior to versions 0.9.10 and 0.8.13 and xmldom version 0.6.0 and prior, the package serializes DocumentType node fields (internalSu…
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High 8.7
xmldom: XML node injection through unvalidated comment serialization
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In @xmldom/xmldom prior to versions 0.9.10 and 0.8.13 and xmldom version 0.6.0 and prior, the package allows attacker-controlled comment content to b…
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Medium 5.4
traccar allows XML injection in KML and GPX exports
Traccar is an open source GPS tracking system. In org.traccar:traccar versions starting at 6.11.1 before 6.13.0, the KML and GPX export functionality writes device names to XML output without proper escaping. An attacker with low privileges can create a devic…
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Medium 6.9
Kirby has XML injection in its XML creator toolkit
Kirby is an open-source content management system. Kirby's `Xml::value()` method has special handling for `<![CDATA[ ]]>` blocks. If the input value is already valid `CDATA`, it is not escaped a second time but allowed to pass through. However, prior to versi…
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High 7.5
xmldom: XML injection via unsafe CDATA serialization allows attacker-controlled markup insertion
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In xmldom versions 0.6.0 and prior and @xmldom/xmldom prior to versions 0.8.12 and 0.9.9, xmldom/xmldom allows attacker-controlled strings containing…
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Medium 5.3
XML injection In /IDC_Logging/checkifdone.cgi Endpoint On IDC SFX Web Management Interface Version 101
Improper neutralization of special elements in the /IDC_Logging/checkifdone.cgi script in International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver Web management Interface version 101 allows for XML Injection. The application reflec…