جزئیات آسیب‌پذیری

SiYuan is a personal knowledge management system. From version 3.6.0 to before version 3.6.2, the SanitizeSVG function introduced in version 3.6.0 to fix XSS in the unauthenticated /api/icon/getDynamicIcon endpoint can be bypassed by using namespace-prefixed element names such as <x:script xmlns:x="http://www.w3.org/2000/svg">. The Go HTML5 parser records the element's tag as "x:script" rather than "script", so the tag check passes it through. The SVG is served with Content-Type: image/svg+xml and no Content Security Policy; when a browser opens the response directly, its XML parser resolves the prefix to the SVG namespace and executes the embedded script. This issue has been patched in version 3.6.2.

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-73g7-86qr-jrg3 x_refsource_CONFIRM
• https://github.com/siyuan-note/siyuan/issues/17246 x_refsource_MISC
• https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2 x_refsource_MISC