CVE-2026-19856 — MEDIUM (6.5)

Vulnerability 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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

References

https://wpscan.com/vulnerability/e35365d3-65de-45a7-9629-17aacd5299c7/

FAQ

What is CVE-2026-19856?

CVE-2026-19856 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 unauthenti...

How severe is CVE-2026-19856?

CVE-2026-19856 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-19856?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.