Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes

Summary The SemanticMediaWiki extension inserts the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Details In ext.smw.js, the data-subtab attribute of all elements with the smw-subtab class is parsed as JSON and appended to the innerHTML of t...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via improper handling of the data-subtab attribute in elements with the smw-subtab class. An attacker can inject arbitrary HTML and execute JavaScript by crafting malicious wikitext that is parsed and inserted...

GHSA-HG8H-557G-Q8PP Semantic MediaWiki vulnerable to stored XSS through wikitext via improper use of non-reserved data attributes

Summary The SemanticMediaWiki extension inserts the unsanitized value of a data attribute into the DOM as HTML, allowing for stored XSS through wikitext. Details In ext.smw.js, the data-subtab attribute of all elements with the smw-subtab class is parsed as JSON and appended to the innerHTML of t...

PT-2026-95461

Name of the Vulnerable Software and Affected Versions Semantic MediaWiki versions 3.1.0 through 6.x Description Stored Cross-Site Scripting XSS is possible through wikitext because the extension inserts the unsanitized value of a data attribute into the Document Object Model DOM as HTML...