CVE-2026-100152 smub CVE debrief

Who should care

Defenders responsible for WordPress installations with the All in One SEO plugin should assess exposure and prioritize verification of AIOSEO breadcrumb rendering on search results pages.

Why it matters

Defenders should prioritize verifying the presence of AIOSEO breadcrumbs on search results pages and ensuring that the plugin is updated to a version that properly validates user input.

• Unauthenticated attackers may execute arbitrary shortcodes
• AIOSEO breadcrumb rendering on search results pages may be exploited
• Verification of plugin input validation is necessary

Technical summary

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. The AIOSEO breadcrumb must be rendered on the search results page via the block, widget, shortcode, or template tag. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM.

Defensive priority

Defenders should prioritize verifying the presence of AIOSEO breadcrumbs on search results pages and ensuring that the plugin is updated to a version that properly validates user input.

Recommended defensive actions

• Verify the presence of AIOSEO breadcrumbs on search results pages
• Ensure that the plugin is updated to a version that properly validates user input
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and references to source code. The vulnerability is caused by 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. The AIOSEO breadcrumb must be rendered on the search results page via the block, widget, shortcode, or template tag. Defenders should verify the presence of AIOSEO ...

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.