Microsoft Edge Bug Could've Let Hackers Steal Your Secrets for Any Site

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Aug 17, 2014
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Microsoft last week rolled out updates for the Edge browser with fixes for two security issues, one of which concerns a security bypass vulnerability that could be exploited to inject and execute arbitrary code in the context of any website.

Tracked as CVE-2021-34506 (CVSS score: 5.4), the weakness stems from a universal cross-site scripting (UXSS) issue that's triggered when automatically translating web pages using the browser's built-in feature via Microsoft Translator.

Credited for discovering and reporting CVE-2021-34506 are Ignacio Laurence as well as Vansh Devgan and Shivam Kumar Singh with CyberXplore Private Limited.

"Unlike the common XSS attacks, UXSS is a type of attack that exploits client-side vulnerabilities in the browser or browser extensions in order to generate an XSS condition, and execute malicious code," CyberXplore researchers said in a write-up shared with The Hacker News.
"When such vulnerabilities are found and exploited, the behavior of the browser is affected and its security features may be bypassed or disabled."

Specifically, the researchers found that the translation feature had a piece of vulnerable code that failed to sanitize input, thus allowing an attacker to potentially insert malicious JavaScript code anywhere in the webpage that's then subsequently executed when the user clicks the prompt on the address bar to translate the page.
 
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