CVE-2021-35503 : Security Advisory and Response
Learn about CVE-2021-35503 affecting Afian FileRun 2021.03.26 and how a stored XSS vulnerability via HTTP X-Forwarded-For header can lead to unauthorized access and data theft. Find mitigation steps.
Afian FileRun 2021.03.26 is affected by a stored XSS vulnerability that can be exploited via an HTTP X-Forwarded-For header, leading to improper handling when displaying Activity Logs.
Understanding CVE-2021-35503
This section will cover the details of the CVE-2021-35503 vulnerability.
What is CVE-2021-35503?
The CVE-2021-35503 vulnerability exists in Afian FileRun 2021.03.26, allowing an attacker to execute stored XSS attacks through a specific HTTP header, which is not properly managed during the rendering of Activity Logs.
The Impact of CVE-2021-35503
The vulnerability can be exploited by malicious actors to inject and execute arbitrary scripts, potentially leading to unauthorized access, data theft, and further compromise of the affected system.
Technical Details of CVE-2021-35503
In this section, we will delve into the technical specifics of CVE-2021-35503.
Vulnerability Description
The vulnerability in Afian FileRun 2021.03.26 enables adversaries to store and execute cross-site scripting (XSS) payloads via a specific HTTP X-Forwarded-For header.
Affected Systems and Versions
The affected version of Afian FileRun is 2021.03.26, where the stored XSS vulnerability exists.
Exploitation Mechanism
Exploiting CVE-2021-35503 requires that an attacker inject malicious scripts through the X-Forwarded-For header, bypassing input validation and leading to XSS execution.
Mitigation and Prevention
This section focuses on the steps to mitigate and prevent the exploitation of CVE-2021-35503.
Immediate Steps to Take
Users should update Afian FileRun to a patched version to address the XSS vulnerability. It is advisable to sanitize user inputs and validate HTTP headers to prevent XSS attacks.
Long-Term Security Practices
Implement a robust security policy, conduct regular security audits, educate users on safe browsing practices, and employ a web application firewall to protect against XSS attacks.
Patching and Updates
Vendor-supplied patches should be promptly applied to ensure the security of the system and prevent exploitation of known vulnerabilities.