Privilege escalation in Ai Copilot

CVE-2026-9810

The AI Copilot WordPress plugin before 1.5.4 does not bind OAuth access tokens to a WordPress user, and accepts any valid token as an administrator session, allowing unauthenticated attackers who complete the public OAuth flow to execute privileged MCP tools as an administrator, including arbitrary user creation and role escalation.

Vulnerability class: Privilege Escalation

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-9810: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

  • Ai Copilot — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-9810?
CVE-2026-9810 is a critical-severity vulnerability in Ai Copilot, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2026-07-17.
How severe is CVE-2026-9810?
Critical severity. CVSS v3 base score is 9.8 out of 10.