CVE-2021-24591 Highlight < 0.9.3 - Authenticated Stored Cross-Site Scripting
Authenticated high-privilege users can inject malicious scripts via the CustomCSS setting in the Highlight WordPress plugin.
- 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-2021-24591?
CVE-2021-24591 is a medium-severity cross-site scripting vulnerability in Unknown Highlight, published on 6 Sep 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 Highlight WordPress plugin before 0.9.3 does not sanitise its CustomCSS setting, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed
Weakness: CWE-79
Which versions are affected by CVE-2021-24591?
It affects 1 product.
Products include Dna88 Highlight.
How do I fix CVE-2021-24591?
No fix has been published for CVE-2021-24591 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-2021-24591 being exploited?
There is no known exploitation of CVE-2021-24591 in the wild and no public exploit code.
Sources
Also known as GHSA-c3m7-gw6j-3wx2.