CVE-2021-38339 Simple Matted Thumbnails <= 1.01 Reflected Cross-Site Scripting
Attackers can inject arbitrary web scripts via reflected PHP_SELF in the Simple Matted Thumbnails WordPress plugin, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-38339?
CVE-2021-38339 is a medium-severity cross-site scripting vulnerability in Simple Matted Thumbnails, published on 10 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Simple Matted Thumbnails WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to a reflected $_SERVER["PHP_SELF"] value in the ~/simple-matted-thumbnail.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.01.
Weakness: CWE-79
Which versions are affected by CVE-2021-38339?
It affects 1 product.
Products include Devondev Simple Matted Thumbnails.
How do I fix CVE-2021-38339?
No fix has been published for CVE-2021-38339 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-2021-38339 being exploited?
There is no known exploitation of CVE-2021-38339 in the wild and no public exploit code.
Sources
Also known as GHSA-v85g-hrr5-4jw4.