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Felipe Restrepo RodríguezWPEX-ID:2AE5C375-A6A0-4C0B-A9EF-E4D2A28BCE5EHistoryApr 19, 2023 - 12:00 a.m.
Bit Form < 1.9 - RCE via Unauthenticated Arbitrary File Upload
2023-04-1900:00:00
Felipe Restrepo Rodríguez
70
rce
unauthenticated user
file upload
malicious html
request interception
uploads directory
0.016 Low
EPSS
Percentile
87.3%
The plugin does not validate the file types uploaded via it’s file upload form field, allowing unauthenticated users to upload arbitrary files types such as PHP or HTML files to the server, leading to Remote Code Execution.
As an unauthenticated user access a form containing a File Upload form.
Upload a malicious html file (containing a malicious js for example) named after an image file, for example, and intercept the request.
Change the filename's extension in the request to html and forward the request.
The malicious HTML will be available on the uploads directory.
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Remote code execution
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