CVE-2026-19856
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
All in One SEO
PublishedOct 2, 2026
First seenOct 2, 2026
Weakness typeCWE-74Injection
How to fix
Update
- All in One SEO5.0.2.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| All in One SEO | v < 5.0.2.1 | 5.0.2.1 |
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