Vulnerability · Published Oct 2, 2026 · Assigned by WPScan

CVE-2026-19856All in One SEO < 5.0.2.1 - Unauthenticated Arbitrary Shortcode Execution via Search Query

Medium 6.5

In plain English

A medium-severity injection in All in One SEO from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 92.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The All in One SEO WordPress plugin before 5.0.2.1 does not correctly determine which shortcodes are present in content derived from user input before deciding which ones to strip, allowing unauthenticated users to execute arbitrary shortcodes registered on the site. On sites upgraded from older versions the protection is disabled outright, making the issue reachable without any crafted input.

Affected products (as reported)

Vendor	Product	Versions
Unknown	All in One SEO	0 – before 5.0.2.1

Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

https://wpscan.com/vulnerability/e35365d3-65de-45a7-9629-17aacd5299c7/ exploit, vdb-entry, technical-description