CVE-2020-8951 Explained : Impact and Mitigation

Fiserv Accurate Reconciliation 2.19.0, fixed in 3.0.0 or higher, allows XSS via the Source or Destination field of the Configuration Manager (Configuration Parameter Translation) page.

Understanding CVE-2020-8951

Fiserv Accurate Reconciliation 2.19.0 is vulnerable to XSS attacks through specific fields, posing a security risk that has been addressed in version 3.0.0 and above.

What is CVE-2020-8951?

This CVE identifies a cross-site scripting (XSS) vulnerability in Fiserv Accurate Reconciliation version 2.19.0, which could be exploited via the Source or Destination field of the Configuration Manager page.

The Impact of CVE-2020-8951

The vulnerability could allow an attacker to execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2020-8951

Fiserv Accurate Reconciliation 2.19.0 XSS Vulnerability

Vulnerability Description

Type: Cross-Site Scripting (XSS)
Affected Version: 2.19.0
Fixed Version: 3.0.0 or higher
Attack Vector: Source or Destination field of the Configuration Manager

Affected Systems and Versions

Affected Version: 2.19.0
Fixed Version: 3.0.0 or higher

Exploitation Mechanism

The vulnerability can be exploited by injecting malicious scripts into the Source or Destination field of the Configuration Manager, allowing attackers to execute unauthorized code in the user's browser.

Mitigation and Prevention

Protecting Against CVE-2020-8951

Immediate Steps to Take

Update Fiserv Accurate Reconciliation to version 3.0.0 or above to mitigate the XSS vulnerability.
Avoid inputting untrusted data into the Source or Destination fields.

Long-Term Security Practices

Regularly monitor and audit input fields for malicious content.
Educate users on safe browsing practices to prevent XSS attacks.

Patching and Updates

Apply security patches and updates provided by Fiserv to ensure the latest security fixes are in place.