CVE-2026-76789 Slider Hero < 9.1.3 - Unauthenticated Stored XSS via Slider Type Change and Add-Slider Handlers
Unauthenticated attackers can inject malicious JavaScript via slider settings, leading to code execution in admin and visitor contexts.
- 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-2026-76789?
CVE-2026-76789 is a high-severity cross-site scripting vulnerability in Unknown Slider Hero with Video Background, Animation, published on 22 Aug 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
The Slider Hero with Video Background, Animation WordPress plugin before 9.1.3 does not have authorisation and nonce checks on two of its request handlers, and does not escape a stored setting before outputting it, allowing unauthenticated users to store malicious JavaScript which will be executed in the context of an administrator viewing the Slider Hero with Video Background, Animation WordPress plugin before 9.1.3's admin area, as well as any visitor of a page embedding a slider.
Weakness: CWE-79
Which versions are affected by CVE-2026-76789?
How do I fix CVE-2026-76789?
No fix has been published for CVE-2026-76789 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-2026-76789 being exploited?
There is no known exploitation of CVE-2026-76789 in the wild and no public exploit code.
Sources
Also known as GHSA-879w-x4vj-2mvp.