CVE-2025-66534: 
WordPress vulnerability analysis and mitigation

CVE-2025-66534 is a Missing Authorization (Broken Access Control) vulnerability in the "The Aisle" WordPress theme developed by Elated-Themes. It allows low-privileged authenticated attackers to exploit incorrectly configured access control security levels, potentially performing actions beyond their intended privilege scope. The vulnerability affects all versions of The Aisle theme up to and including version 2.9, with version 2.9.1 serving as the patched release. It was reported on October 28, 2025, by Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) and published by Patchstack on November 27, 2025. The CVSS v3.1 base score is 4.3 (Medium) (Patchstack).

The vulnerability is classified as CWE-862 (Missing Authorization), meaning one or more functions within the theme fail to perform adequate authorization checks before executing privileged actions. This allows a subscriber-level (low-privilege) authenticated user to invoke functionality that should be restricted to higher-privileged roles such as administrators. The attack vector is network-based, requires low privileges, no user interaction, and has low attack complexity. No public technical write-up or proof-of-concept code detailing the specific vulnerable function has been published (Patchstack).

Successful exploitation allows a low-privileged authenticated attacker to perform unauthorized actions on the affected WordPress site, primarily resulting in a low integrity impact (unauthorized data modification). Confidentiality and availability are not directly impacted according to the CVSS scoring. In practice, broken access control vulnerabilities in WordPress themes can be leveraged in mass-exploit campaigns targeting thousands of sites regardless of their size or popularity, potentially enabling unauthorized content modification or privilege escalation within the WordPress environment (Patchstack).

There is no known public proof-of-concept exploit and no evidence of active in-the-wild exploitation at this time. The EPSS score is approximately 0.017% (0.000170), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Patchstack classifies this as low priority with no impactful threat, though they note that vulnerabilities of this class are sometimes used in mass-exploit campaigns against WordPress sites (Patchstack).

The primary remediation is to update The Aisle WordPress theme to version 2.9.1 or later, which contains the fix for this vulnerability. If an immediate update is not possible, site administrators should review and restrict user access controls, limiting subscriber-level accounts to only trusted users. As a temporary measure, disabling the theme until the update can be applied is advisable. Additionally, conducting a security audit of the WordPress site and monitoring for unauthorized access or suspicious activity is recommended (Patchstack).