CVE-2026-19807 ByteCoreStack MCP Connector for AI Tools - Privilege Escalation

ByteCoreStack MCP Connector for AI Tools WordPress plugin <= 1.2.3 contains a privilege escalation caused by insufficient meta key protection in wp_update_user_meta within execute_tool, letting authenticated subscribers escalate to administrator via MCP JSON-RPC, exploit requires subscriber-level access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.38% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-269

Vendor fix

Update to the latest version beyond 1.2.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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