CVE-2020-35854 Cross-site scripting in n/a

Medium 4.8 Published 25 Jan 2021 Updated 9 Jul 2026

An attacker can inject malicious scripts via the Body parameter in Textpattern, potentially executing code or stealing data.

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

What is CVE-2020-35854?

CVE-2020-35854 is a medium-severity cross-site scripting vulnerability in n/a, published on 25 Jan 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Textpattern 4.8.4 is affected by cross-site scripting (XSS) in the Body parameter.

Weakness: CWE-79

Which versions are affected by CVE-2020-35854?

It affects 1 product.

Products include Textpattern Textpattern.

How do I fix CVE-2020-35854?

No fix has been published for CVE-2020-35854 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-2020-35854 being exploited?

There is no known exploitation of CVE-2020-35854 in the wild and no public exploit code.

Sources

Also known as GHSA-9pvv-mpwh-r55x.