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Research > Zero-Day Tracker > 20130429

iOS Safari text/plain Cross-Site Scripting Vulnerability

Date Disclosed:

Date Patched:
9/18/2013 when iOS 7 was publicly released


Affected Software:
Mobile Safari on iOS 6.1.4 and prior

Mobile Safari does not properly evaluate the text/plain Content-Type. Instead, it decides how to display the page, based on the page’s elements. Therefore, pages that would normally be rendered as plaintext (using the Content-Type: text/plain) could be rendered as HTML. This allows an attacker to execute arbitrary JavaScript code within the context of the current user.


Code Execution:
Yes: JavaScript Code Execution

Cross-Site Scripting
Exploitation of this vulnerability is possible via maliciously crafted HTML document being served with a Content-Type of text/plain. Attackers who successfully exploit this vulnerability will be able to execute JavaScript code within the user’s browser, performing actions on behalf of that user.

Use an alternate mobile browser, such as Chrome.

BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

  • 30602 - Apple iOS Multiple Vulnerabilities (20130919)


2013-04-26: Original Disclosure
2013-09-18: Apple releases iOS 7 which contains a fix for this issue

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