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OctoberCMS 1.0.425 Cross Site Scripting

Posted on 12 October 2017

# Exploit Title: OctoberCMS 1.0.425 (aka Build 425) Stored XSS # Vendor Homepage: https://octobercms.com/ # Software Link: https://octobercms.com/download # Exploit Author: Ishaq Mohammed ( https://packetstormsecurity.com/files/author/13150/ ) # Contact: https://twitter.com/security_prince # Website: https://about.me/security-prince # Category: webapps # CVE: CVE-2017-15284 1. Description Cross-Site Scripting exists in OctoberCMS 1.0.425 (aka Build 425), allowing a least privileged user to upload an SVG file containing malicious code as the Avatar for the profile. When this is opened by the Admin, it causes JavaScript execution in the context of the Admin account. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15284 2. Proof of Concept Steps to Reproduce: - Login using a normal user and click on my account. - Click on the avatar. - Upload the malicious .svg file which contains the javascript - Click on save. - Login in another browser with Admin Credentials. - Click on Settings > Administrators. - Select the normal user's avatar and click on Attachment URL. 3. Reference https://github.com/octobercms/library/commit/3bbbbf3da469f457881b5af902eb0b 89b95189a2 4. Solution The vulnerability will be patched by the vendor in the next release of OctoberCMS. -- Best Regards, Ishaq Mohammed https://about.me/security-prince

 

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