CVE-2017-20033 PHPList Reflected cross site scriting

Medium 4.3 Published 10 Jun 2022 Updated 15 Apr 2025

Remote attackers can execute arbitrary scripts in victims' browsers via a reflected XSS vulnerability in the admin interface of PHPList.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2017-20033?

CVE-2017-20033 is a medium-severity cross-site scripting vulnerability in unspecified PHPList, published on 10 Jun 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A vulnerability classified as problematic has been found in PHPList 3.2.6. This affects an unknown part of the file /lists/admin/. The manipulation of the argument page with the input send\'\";><script>alert(8)</script> leads to cross site scripting (Reflected). It is possible to initiate the attack remotely. Upgrading to version 3.3.1 is able to address this issue. It is recommended to upgrade the affected component.

Weakness: CWE-79, CWE-80

Which versions are affected by CVE-2017-20033?

It affects 1 product.

Products include Phplist Phplist.

How do I fix CVE-2017-20033?

No fix has been published for CVE-2017-20033 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2017-20033 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20033 exists.

Sources

Also known as GHSA-jff2-f2xp-77cm.