CVE-2026-19856

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

Published Oct 2, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions all In One Seo
Vendors & Products Wordpress-extensions
Wordpress-extensions all In One Seo
Type Values Removed Values Added
Weaknesses CWE-94
Type Values Removed Values Added
Weaknesses CWE-74
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-94
Type Values Removed Values Added
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.
Title All in One SEO < 5.0.2.1 - Unauthenticated Arbitrary Shortcode Execution via Search Query
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Oct 6, 2026, 8:20 PM
Reserved
Aug 14, 2026, 9:46 AM
Status
Deferred
Published
Oct 2, 2026, 7:16 PM
Modified
Oct 6, 2026, 9:17 PM