DOMSanitizer is a DOM\/SVG\/MathML Sanitizer for PHP 7.3+. Prior to version 1.0.15, the isDangerousUrl() method is responsible for rejecting dangerous URL values in the href and xlink:href attributes. The weakness is that “javascript:” is rejected as a scheme, while “data:” is rejected only when the literal substring onload appears in the URL value (\/^data:.*onload\/i). Because data: payloads are routinely Base64-encoded, the dangerous content (, event handlers, etc.) is invisible to that substring test. A URL such as data:text\/html;base64,\u2026 therefore survives in href \/ xlink:href, even though the decoded payload is active markup. This is an incomplete input-validation \/ sanitization defect in the sanitizer itself. This issue has been patched in version 1.0.15.<\/p>\n","protected":false},"excerpt":{"rendered":"
DOMSanitizer is a DOM\/SVG\/MathML Sanitizer for PHP 7.3+. Prior to version 1.0.15, the isDangerousUrl() method is responsible for rejecting dangerous URL values in the href and xlink:href attributes. T<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-30319","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/30319","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30319"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30319"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}