CVE-2020-26768 : Security Advisory and Response
Learn about CVE-2020-26768, a vulnerability in Formstone <=1.4.16 that allows remote attackers to execute malicious scripts in victims' browsers. Find mitigation steps and preventive measures here.
Formstone <=1.4.16 is vulnerable to a Reflected Cross-Site Scripting (XSS) vulnerability due to improper validation of user input in specific files. This could allow a remote attacker to execute malicious scripts in a victim's browser.
Understanding CVE-2020-26768
Formstone <=1.4.16 is susceptible to a Reflected Cross-Site Scripting (XSS) vulnerability that could be exploited by an attacker to execute scripts in a victim's browser.
What is CVE-2020-26768?
CVE-2020-26768 refers to a vulnerability in Formstone <=1.4.16 that allows a remote attacker to execute malicious scripts in a victim's browser by exploiting improper input validation in certain files.
The Impact of CVE-2020-26768
The vulnerability could enable an attacker to execute scripts in a victim's browser within the security context of the hosting website. This could lead to various malicious activities, including stealing authentication credentials and executing malware.
Technical Details of CVE-2020-26768
Formstone <=1.4.16 is vulnerable to a Reflected Cross-Site Scripting (XSS) issue due to inadequate validation of user input in the upload-target.php and upload-chunked.php files.
Vulnerability Description
The vulnerability arises from improper validation of user-supplied input, allowing a remote attacker to craft a URL that executes scripts in a victim's browser.
Affected Systems and Versions
- Product: Formstone
- Vendor: N/A
- Versions: <=1.4.16
Exploitation Mechanism
An attacker can exploit this vulnerability by sending a specially crafted URL to a victim. Once the victim clicks or visits the URL, the attacker can execute scripts in the victim's browser.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-26768.
Immediate Steps to Take
- Update Formstone to a version that addresses the XSS vulnerability.
- Implement input validation and sanitization mechanisms to prevent XSS attacks.
Long-Term Security Practices
- Regularly monitor and update web application security measures.
- Educate users about the risks of clicking on unknown or suspicious URLs.
Patching and Updates
- Apply patches or updates provided by Formstone to fix the XSS vulnerability.