CVE-2020-20391 Cross-site scripting in n/a

Medium 5.4 Published 23 Jun 2021 Updated 4 Aug 2024

An attacker can inject malicious scripts into GetSimple CMS snippets, potentially leading to session hijacking or arbitrary 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-2020-20391?

CVE-2020-20391 is a medium-severity cross-site scripting vulnerability in n/a, published on 23 Jun 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Cross Site Scripting vulnerability in GetSimpleCMS 3.4.0a in admin/snippets.php via (1) Add Snippet and (2) Save snippets.

Weakness: CWE-79

Which versions are affected by CVE-2020-20391?

It affects 1 product.

Products include Get-Simple Getsimplecms.

How do I fix CVE-2020-20391?

No fix has been published for CVE-2020-20391 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-2020-20391 being exploited?

There is no known exploitation of CVE-2020-20391 in the wild and no public exploit code.

Sources

Also known as GHSA-7x6v-w562-gm77.