CVE-2021-39356 Content Staging <= 2.0.1 Authenticated Stored Cross-Site Scripting
Administrators can inject arbitrary web scripts in Content Staging plugin when unfiltered_html is disabled, leading to stored XSS.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-39356?
CVE-2021-39356 is a medium-severity cross-site scripting vulnerability in Content Staging, published on 21 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Content Staging WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and escaping via several parameters that are echo'd out via the ~/templates/settings.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 2.0.1. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.
Weakness: CWE-79
Which versions are affected by CVE-2021-39356?
It affects 1 product.
Products include Content Staging Project Content Staging.
How do I fix CVE-2021-39356?
No fix has been published for CVE-2021-39356 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-2021-39356 being exploited?
There is no known exploitation of CVE-2021-39356 in the wild and no public exploit code.
Sources
Also known as GHSA-9xwx-6whw-r67w.