CVE-2021-40658 Cross-site scripting in n/a

Medium 4.8 Published 14 Jun 2022 Updated 4 Aug 2024

Attackers can inject malicious HTML into the body content, potentially leading to script execution and data theft in Textpattern CMS.

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-2021-40658?

CVE-2021-40658 is a medium-severity cross-site scripting vulnerability in n/a, published on 14 Jun 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Textpattern 4.8.7 is affected by a HTML injection vulnerability through “Content>Write>Body”.

Weakness: CWE-79

Which versions are affected by CVE-2021-40658?

It affects 1 product.

Products include Textpattern Textpattern.

How do I fix CVE-2021-40658?

No fix has been published for CVE-2021-40658 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-2021-40658 being exploited?

There is no known exploitation of CVE-2021-40658 in the wild and no public exploit code.

Sources

Also known as GHSA-v23m-4wgj-2gjp.