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Cross-site Scripting occurrences in Bigtree Cms
BigTree CMS 4.4.16 was discovered to contain an arbitrary file upload vulnerability which allows attackers to execute arbitrary code via a crafted PDF file. (2022-08-03, CVE-2022-36197)
Cross Site Scripting (XSS) vulnerabilty exists in BigTree-CMS 4.4.3 in the tag name field found in the Tags page under the General menu via a crafted website name by doing an authenticated POST HTTP request to admin/tags/create. (2021-08-26, CVE-2020-18467)
A stored cross-site scripting (XSS) vulnerability was discovered in BigTree CMS 4.4.10 and earlier which allows an authenticated attacker to execute arbitrary web scripts or HTML via the page content to site/index.php/admin/pages/update. (2021-06-01, CVE-2020-26669)
In the 4.2.23 version of BigTree, a Stored XSS vulnerability has been discovered in /admin/ajax/file-browser/upload/ (aka the image upload area). (2018-10-16, CVE-2018-18308)
BigTree-CMS contains a Cross Site Scripting (XSS) vulnerability in /users/create that can result in The low-privileged users can use this vulnerability to attack high-privileged(Developer) users.. This attack appear to be exploitable via no. This vulnerability appears to have been fixed in after commit b652cfdc14d0670c81ac4401ad5a04376745c279. (2018-06-26, CVE-2018-1000521)
BigTree before 4.2.22 has XSS in the Users management page via the name or company field. (2018-04-30, CVE-2018-10364)
An issue was discovered in BigTree 4.2.22. There is cross-site scripting (XSS) in /core/inc/lib/less.php/test/index.php because of a $_SERVER['REQUEST_URI'] echo, as demonstrated by the dir parameter in a file=charsets action. (2018-04-17, CVE-2018-10183)
Cross-site scripting (XSS) in BigTree 4.2.19 allows any remote users to inject arbitrary web script or HTML via the directory parameter. This issue exists in core/admin/ajax/developer/extensions/file-browser.php. (2018-01-23, CVE-2018-6013)
Why Cross-site Scripting can be dangerous
Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.
The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:
https://server.com/confirmation?message=Transaction+Complete
what results in:
<span>Confirmation: Transaction Complete</span>
In that case the message can be modified to become a valid Javascript code, e.g.:
https://server.com/confirmation?message=<script>dangerous javascript code here</script>
and it will be executed locally by the user's browser with full access to the user's personal application/browser data:
<span>Confirmation: <script>dangerous javascript code here</script></span>