All in One SEO < 5.0.2.1 - Unauthenticated Arbitrary Shortcode Execution via Search Query
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.
CVE-2026-19856
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-19856
All in One SEO
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Unknown",
"product": "All in One SEO",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "5.0.2.1",
"versionType": "semver"
}
],
"collectionURL": "https://wordpress.org/plugins",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-19856
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #11624 · Revision 1
- Added to Heist Feed
- Publisher date