CVE-2021-27517 : Vulnerability Insights and Analysis

Foxit PDF SDK For Web through 7.5.0 allows XSS, enabling arbitrary JavaScript code execution in the browser through malicious PDFs.

Understanding CVE-2021-27517

This CVE-2021-27517 impacts Foxit PDF SDK For Web, allowing for XSS attacks with severe consequences.

What is CVE-2021-27517?

Foxit PDF SDK For Web through version 7.5.0 is vulnerable to XSS, permitting the execution of arbitrary JavaScript code via malicious PDFs.

The Impact of CVE-2021-27517

A victim uploading a PDF file containing embedded JavaScript code that abuses the app.alert function in the Acrobat JavaScript API can lead to arbitrary code execution.

Technical Details of CVE-2021-27517

Foxit PDF SDK For Web through 7.5.0 presents vulnerabilities that can be exploited through specific manipulation techniques.

Vulnerability Description

The CVE-2021-27517 flaw allows attackers to execute arbitrary JavaScript code in the victim's browser using PDF files embedded with malicious JavaScript.

Affected Systems and Versions

All systems using Foxit PDF SDK For Web up to version 7.5.0 are vulnerable to this exploit.

Exploitation Mechanism

By uploading a PDF document containing JavaScript code that misuses the app.alert function, an attacker can trigger the malicious code execution in the victim's browser.

Mitigation and Prevention

Preventive measures and immediate actions are necessary to mitigate the risks associated with CVE-2021-27517.

Immediate Steps to Take

Users should avoid opening PDFs from untrusted sources and ensure all PDFs are scanned for malicious code before opening.

Long-Term Security Practices

Regularly update Foxit PDF SDK For Web to the latest version to patch known vulnerabilities and enhance security measures.

Patching and Updates

Stay informed about security bulletins and updates from Foxit to address CVE-2021-27517 and other potential vulnerabilities.