Is CVE-2017-20034 actively exploited?

No active exploitation of CVE-2017-20034 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-20034 be exploited remotely?

Yes. CVE-2017-20034 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-20034?

CVE-2017-20034 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2017-20034

CWE-80Published: June 10, 2022· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

A vulnerability classified as problematic was found in PHPList 3.2.6. This vulnerability affects unknown code of the file /lists/admin/ of the component List Name. The manipulation leads to cross site scripting (Persistent). The attack can be initiated remotely. Upgrading to version 3.3.1 is able to address this issue. It is recommended to upgrade the affected component.

NVD Source

Technical Analysis

CVE-2017-20034 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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.