CVE-2021-26722 : Vulnerability Insights and Analysis

LinkedIn Oncall through 1.4.0 is vulnerable to a reflected Cross-Site Scripting (XSS) attack due to the mishandling of the "No results found for" message in the search bar.

Understanding CVE-2021-26722

This CVE affects LinkedIn Oncall versions up to 1.4.0, allowing malicious actors to execute XSS attacks through the /query endpoint.

What is CVE-2021-26722?

CVE-2021-26722 is a vulnerability in LinkedIn Oncall that enables attackers to conduct reflected XSS attacks by exploiting the handling of certain search bar messages.

The Impact of CVE-2021-26722

The security flaw in LinkedIn Oncall up to version 1.4.0 can lead to the execution of malicious scripts in the context of a user's session, potentially compromising sensitive data or performing unauthorized actions.

Technical Details of CVE-2021-26722

LinkedIn Oncall versions 1.4.0 and below are susceptible to a reflected XSS issue, posing a security risk to users and their data.

Vulnerability Description

The vulnerability arises from the incorrect processing of the "No results found for" message in the search bar, allowing attackers to inject and execute malicious scripts.

Affected Systems and Versions

LinkedIn Oncall versions up to 1.4.0 are impacted by this XSS vulnerability, potentially exposing users to various security risks.

Exploitation Mechanism

Malicious actors can exploit this vulnerability by crafting and submitting a specially crafted link or script through the /query endpoint, leading to the execution of unauthorized code.

Mitigation and Prevention

To protect systems and data from CVE-2021-26722, immediate action and long-term security measures are essential.

Immediate Steps to Take

Upgrade LinkedIn Oncall to a patched version that addresses the XSS vulnerability.
Educate users about the risks of clicking on suspicious links or interacting with untrusted content.

Long-Term Security Practices

Implement regular security training for developers and users to raise awareness of XSS and other common attacks.
Conduct security audits and code reviews to identify and remediate vulnerabilities promptly.

Patching and Updates

Stay informed about security patches and updates released by LinkedIn for LinkedIn Oncall to ensure your systems are protected against known vulnerabilities.