Other nomination

Back to the (Clip)board with Microsoft Whiteboard and Excalidraw in Meta (CVE-2023-26140)

Examines the Clipboard API as an under-analysed source of untrusted input, since any page can silently rewrite what a visitor copies. In Excalidraw, pasted element data carried a link value assigned to an SVG anchor's href, permitting a javascript: URL that static analysis rules missed, while Microsoft Whiteboard accepted an attacker-supplied iframe sandbox attribute whose permissive values, such as allow-top-navigation, redirected the host application (CVE-2023-26140).

Record

Date

4 February 2024

In the archive

• Nominated for the 2024 Top 10 Web Hacking Techniques

Tags

• xss
• iframe
• open-redirect
• static-analysis
• cve
• clipboard
• owasp-a03-2021
• owasp-a04-2021

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