Cross-Site Scripting Vulnerability in verot/class.upload.php
Summary
CVE-2023-6551: class.upload.php allows cross-site scripting attacks via uploaded files. Affects verot/class.upload.php versions < 2.1.6. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
verot/class.upload.php is a library used for handling file uploads in PHP applications. It provides various functionalities for processing and manipulating uploaded files. However, the library is vulnerable to a cross-site scripting (XSS) attack when the default configuration is used.
Vulnerability Detail
The vulnerability arises due to the lack of thorough file checks performed by class.upload.php. This allows an attacker to upload a malicious file containing JavaScript code, which can then be executed in the context of other users accessing the file. This stored XSS vulnerability can lead to various consequences, such as unauthorized access, data theft, or the injection of malicious content into the application.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
A possible workaround for this vulnerability is to manually validate and sanitize the uploaded files before processing them with class.upload.php. This can be done by implementing custom file checks and using libraries or functions specifically designed for secure file handling.
Conclusion
The cross-site scripting vulnerability in verot/class.upload.php can be mitigated by implementing extension whitelisting and enforcing the correct content-type based on the file extension. Developers should also consider manually validating and sanitizing uploaded files to further enhance security. For more information and assistance in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for verot/class.upload.php →
FAQ
class.upload.php is a PHP library used for handling file uploads. It provides functionalities for resizing, cropping, and manipulating images, as well as other file-related operations.
The vulnerability occurs due to the lack of thorough file checks in class.upload.php. This allows an attacker to upload a file containing malicious JavaScript code, which can then be executed in the context of other users accessing the file.
The potential consequences of this vulnerability include unauthorized access to user data, data theft, and the injection of malicious content into the application.
Developers can fix this vulnerability by implementing extension whitelisting and ensuring the server provides the correct content-type based on the file extension. This helps mitigate the risk of XSS attacks.
A possible workaround is to manually validate and sanitize uploaded files before processing them with class.upload.php. This involves implementing custom file checks and using secure file handling libraries or functions.
References
Related vulnerabilities
Recent vulnerabilities recorded for verot/class.upload.php.
