Information
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Advisory by Netsparker (now Invicti)
Name: Multiple Vulnerabilities in Platformus 1.0.0-alpha21
Affected Software: Platformus
Affected Versions: 1.0.0-alpha21
Homepage: http://www.platformus.net/
Vulnerability: Stored XSS
Severity: High
Status: Fixed
CVE-ID: 2018-14487
CVSS Score (3.0): CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Invicti Advisory Reference: NS-18-012

Technical Details
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Stored XSS

URL: http://{platformus_url}/backend/cultures/create
Parameter Name: code
Parameter Type: POST
Attack Pattern: "><script>alert(1)</script>

For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS).

Advisory Timeline
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29th September 2017 - First Contact
1st October 2017 - Technical Details Reported
11th December 2018 - Attempted to Contact 
17th January 2018 - Attempted to Contact 
26th October 2018 - Advisory Released

Credits & Authors
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These issues have been discovered by Mustafa Yalçın while testing Invicti Web Application Security Scanner.

About Invicti
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Invicti Security is transforming the way web applications are secured. Invicti empowers organizations in every industry to scale their overall security operations, make the best use of their security resources, and engage developers in helping to improve their overall security posture.