Cyber Risks · PortSwigger Research

Professional 1.6.11

Summary: PortSwigger released Burp Suite Professional 1.6.11 on 17 February 2015, adding a new Scanner check for path-relative style sheet import (PRSSI) vulnerabilities, sometimes called relative path overwrite. The release states the key prerequisite - a CSS import directive using a path-relative URL - is common and seemingly innocuous, that real vulnerabilities are prevalent in the wild, and that impact is in many cases serious and equivalent to cross-site scripting.

Why it matters: PRSSI was not widely understood by testers or developers at the time, and the trigger is a CSS import directive that appears harmless and shows up frequently - so the exposure sits in code most teams never thought to review.

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Topics
Zero-Days & Exploits
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