CVE-2026-103068

HighCVSS 8.8

Published: 01/10/2026(UTC)Updated: 01/10/2026(UTC)Translated: 01/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.23%

13th percentile - higher than 13% of all known CVEs

Summary

The ByteCoreStack – MCP Connector for AI Tools plugin in versions up to 1.2.2 contains a Subscriber Privilege Escalation vulnerability. A low-privileged user can gain higher privileges within the application.

Risk Assessment

A subscriber can escalate privileges to access administrative functions, potentially leading to configuration or data modification on the WordPress site.

Recommendation

Update the ByteCoreStack – MCP Connector for AI Tools plugin to a version newer than 1.2.2. Until then, consider restricting subscriber registrations.

Other vulnerabilities in ByteCoreStack – MCP Connector for AI Tools

CVE-2026-19807High
The ByteCoreStack – MCP Connector for AI Tools plugin for WordPress up to version 1.2.3 is vulnerable to privilege escalation. The vulnerability stems from the `wp_update_user_meta` MCP tool in `execute_tool` gating writes solely with `current_user_can('edit_user', $uid)` – which WordPress core's `map_meta_cap` resolves to the `read` primitive when the target user ID matches the caller's own – while enforcing an incomplete meta key blocklist that covers only `user_pass`, `user_activation_key`, and `session_tokens`, leaving the `wp_capabilities` and `wp_user_level` meta keys entirely unprotected. This allows authenticated attackers with Subscriber-level access and above to elevate their privileges to Administrator by issuing a `wp_update_user_meta` call over the MCP JSON-RPC endpoint with `key=wp_capabilities` and an arbitrary role array such as `{'administrator': true}` targeting their own user ID.

Original NVD description (English source)

Subscriber Privilege Escalation in ByteCoreStack – MCP Connector for AI Tools <= 1.2.2 versions.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS