security: block dangerous URL schemes in slideshow and compare embeds #146
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Filter out javascript:, vbscript:, file:, and data: URLs in image embeds for defense-in-depth, aligning with markdown-it's link validation.
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Summary
Filter out
javascript:,vbscript:,file:, anddata:URLs in slideshow and compare image embeds.This aligns with markdown-it's built-in link validation approach for defense-in-depth.
Changes
slideshow.js: Add URL scheme check before accepting image URLscompare.js: Add URL scheme check for both left and right images