CVE-2026-22406: 
WordPress vulnerability analysis and mitigation

CVE-2026-22406 is an Authorization Bypass Through User-Controlled Key (IDOR) vulnerability in the Mikado-Themes Overton WordPress theme. It allows attackers to exploit incorrectly configured access control security levels by manipulating user-controlled keys. The vulnerability affects Overton versions up to and including 1.3. It was disclosed on January 22, 2026, by Patchstack, and carries a CVSS v3.1 base score of 3.8 (Low), as assigned by Patchstack (Patchstack).

The vulnerability is classified as CWE-639 (Authorization Bypass Through User-Controlled Key), commonly known as an Insecure Direct Object Reference (IDOR). An attacker can manipulate a user-controlled key or identifier in requests to bypass access control checks and access or modify resources they are not authorized to interact with. Exploitation requires network access and high privileges (PR:H per the Patchstack CVSS vector), and no user interaction is needed. No public proof-of-concept code has been identified at this time (Patchstack).

Successful exploitation results in limited unauthorized access to confidential data (low confidentiality impact) and the ability to make limited unauthorized modifications to data (low integrity impact), with no availability impact. The scope is unchanged, meaning exploitation is confined to the vulnerable WordPress theme component. Given the high privilege requirement, the practical risk is somewhat constrained, but authenticated high-privileged attackers could access or tamper with objects belonging to other users or restricted areas of the site (Patchstack).

No evidence of active in-the-wild exploitation has been reported for CVE-2026-22406. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. The EPSS score is approximately 0.017% (0.000170), indicating a very low probability of exploitation in the near term. No exploit kits, weaponized tools, or threat actor attribution have been identified (Feedly).

Users of the Overton WordPress theme by Mikado-Themes should update to a version beyond 1.3 if a patched release is available from the vendor. Site administrators should review access control configurations within the theme and restrict high-privileged accounts to trusted users only. Monitoring WordPress audit logs for unexpected access to restricted objects or resources is also recommended as a compensating control (Patchstack).