Is CVE-2020-20640 actively exploited?

No active exploitation of CVE-2020-20640 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-20640 be exploited remotely?

Yes. CVE-2020-20640 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-20640?

CVE-2020-20640 has a CVSS score of 6.1 (MEDIUM).

HOME VULNERABILITIESCVE-2020-20640

MEDIUM

CVE-2020-20640

CWE-79Published: June 28, 2021· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

Cross Site Scripting (XSS) vulnerability in ECShop 4.0 due to security filtering issues, in the user.php file, we can use the html entity encoding to bypass the security policy of the safety.php file, triggering the xss vulnerability.

NVD Source

Technical Analysis

CVE-2020-20640 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.