# 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.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **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 available:** No
- **Published:** 22 Aug 2026
- **Updated:** 23 Aug 2026
- **Also known as:** GHSA-879w-x4vj-2mvp

## 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 (Improper Neutralization of Input During Web Page Generation)

## 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.

## Is CVE-2026-76789 being exploited?

There is no known exploitation of CVE-2026-76789 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76789 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-76789 in the wild and no public exploit code.

Affected product: Unknown Slider Hero with Video Background, Animation. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-76789/ (Markdown: https://insights.sbomify.com/CVE-2026-76789/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76789
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76789
- OSV: https://osv.dev/vulnerability/CVE-2026-76789

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76789/
Summaries are generated and may contain mistakes; the official description above is the record.