CVE-2021-24439 Browser Screenshots < 1.7.6 - Contributor+ Stored XSS
Contributor-level users can inject malicious scripts via the image_class parameter in the Browser Screenshots plugin, potentially compromising other users.
- 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-2021-24439?
CVE-2021-24439 is a medium-severity cross-site scripting vulnerability in Unknown Browser Screenshots, published on 12 Jul 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
The Browser Screenshots WordPress plugin before 1.7.6 allowed authenticated users with a role as low as Contributor to perform Stored Cross-Site Scripting attacks as the image_class parameter of the browser-shot shortcode was not escaped.
Weakness: CWE-79
Which versions are affected by CVE-2021-24439?
It affects 1 product.
Products include Prothemedesign Browser Screenshots.
How do I fix CVE-2021-24439?
No fix has been published for CVE-2021-24439 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-2021-24439 being exploited?
There is no known exploitation of CVE-2021-24439 in the wild and no public exploit code.
Sources
Also known as GHSA-7xfg-7frc-9fj7.