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OctoberCMS 1.0.425 Cross Site Scripting

OctoberCMS 1.0.425 Cross Site Scripting
Posted Oct 12, 2017
Authored by Ishaq Mohammed

OctoberCMS version 1.0.425 suffers from a stored cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2017-15284
MD5 | f858f84c1697f98f8c75cd03f41c39b5

OctoberCMS 1.0.425 Cross Site Scripting

Change Mirror Download
# 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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