# Content Slider Block – Create fully functional slider with Gutenberg block <= 3.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Slide Button Link

- **ID:** WPSEC-2026-1725
- **Plugin:** Content Slider Block – Bring your content to life with slides (`content-slider-block`), https://wordpress.org/plugins/content-slider-block/
- **Affected versions:** all versions before 3.2.2
- **Fixed in:** 3.2.2 (Update to 3.2.2 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-10-27)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/content-slider-block
- **Fix released:** 2026-10-26
- **Published:** 2026-10-27
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1725/

## Description

The Content Slider Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the slide button link (btnLink) attribute of the Content Slider block in all versions up to, and including, 3.2.1. This is due to the block attributes being passed unsanitized from the server to the frontend script, which uses the button link as the href of the slide button without validating its URL scheme, so javascript: URLs are rendered. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute when a user clicks the slide button on an injected page.

## References

- https://wpsec.com/vuln/WPSEC-2026-1725/
- https://plugins.svn.wordpress.org/content-slider-block/tags/3.2.2/
- https://wordpress.org/plugins/content-slider-block/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1725/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.