CVE-2017-20035 PHPList Subscribe Persistent cross site scriting

Low 3.5 Published 10 Jun 2022 Updated 15 Apr 2025

Persistent cross-site scripting in PHPList allows remote attackers to inject malicious scripts, potentially leading to session hijacking or code execution.

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

What is CVE-2017-20035?

CVE-2017-20035 is a low-severity cross-site scripting vulnerability in unspecified PHPList, published on 10 Jun 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A vulnerability, which was classified as problematic, has been found in PHPList 3.2.6. This issue affects some unknown processing of the file /lists/admin/ of the component Subscribe. The manipulation leads to cross site scripting (Persistent). The attack may be initiated 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-2017-20035?

It affects 1 product.

Products include Phplist Phplist.

How do I fix CVE-2017-20035?

No fix has been published for CVE-2017-20035 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-2017-20035 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20035 exists.

Sources

Also known as GHSA-w8mj-62rj-8cjc.