Description
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(name) path without validating the attribute name, while Document.createAttribute(name) validates against QName. XMLSerializer.serializeToString() emits attribute names verbatim, and requireWellFormed: true did not validate them, so a crafted name can terminate the intended attribute and inject additional attributes, including event handlers, into browser-consumed output; synthesized xmlns:PREFIX declarations expose the same unchecked-name boundary. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; no fixed version is available for xmldom.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
xmldom xmldom
<= 0.6.0affected
@xmldom xmldom
>= 0.7.0, < 0.8.14affected>= 0.9.0, < 0.9.11affected
References
- https://github.com/xmldom/xmldom/security/advisories/GHSA-4w3w-2rp5-g8jm ↗
- https://github.com/xmldom/xmldom/pull/1043 ↗
- https://github.com/xmldom/xmldom/pull/1050 ↗
- https://github.com/xmldom/xmldom/commit/cba1321218b069182695813fa7565653708e172e ↗
- https://github.com/xmldom/xmldom/commit/d8212e632507eaf1d9f609657dd4c56abeb12d44 ↗
- https://github.com/xmldom/xmldom/releases/tag/0.8.14 ↗
- https://github.com/xmldom/xmldom/releases/tag/0.9.11 ↗