CVE-2026-28099 WordPress UberSlider Ultra plugin <= 2.3 - Reflected Cross Site Scripting (XSS) vulnerability
Reflected XSS in UberSlider Ultra allows attackers to inject malicious scripts into web pages viewed by other users.
- 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-2026-28099?
CVE-2026-28099 is a high-severity cross-site scripting vulnerability in LambertGroup UberSlider Ultra, published on 5 Mar 2026. 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
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup UberSlider Ultra uberSlider_ultra allows Reflected XSS.This issue affects UberSlider Ultra: from n/a through <= 2.3.
Weakness: CWE-79
Which versions are affected by CVE-2026-28099?
How do I fix CVE-2026-28099?
No fix has been published for CVE-2026-28099 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-2026-28099 being exploited?
There is no known exploitation of CVE-2026-28099 in the wild and no public exploit code.
Sources
Also known as GHSA-9mj3-mx3p-6w2f.