CVE-2023-3666 Sticky Side Buttons < 2.0.0 - Admin+ Stored XSS
Admin users can inject malicious scripts via plugin settings, enabling stored XSS attacks in multisite environments where unfiltered HTML is disabled.
- 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-2023-3666?
CVE-2023-3666 is a low-severity cross-site scripting vulnerability in Unknown Sticky Side Buttons, published on 3 Sep 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Sticky Side Buttons WordPress plugin before 2.0.0 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
Weakness: CWE-79
Which versions are affected by CVE-2023-3666?
It affects 1 product.
Products include Maevelander Sticky Side Buttons.
How do I fix CVE-2023-3666?
No fix has been published for CVE-2023-3666 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-2023-3666 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-3666 exists.
Sources
Also known as GHSA-93g6-qwj4-59m7.