CVE-2026-39613: 
WordPress vulnerability analysis and mitigation

CVE-2026-39613 is a PHP Local File Inclusion (LFI) vulnerability in the kutethemes Boutique WordPress theme (slug: kute-boutique), classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). It affects all versions of the Boutique theme through 2.3.3. The vulnerability was reported by João Pedro S Alcântara (Kinorth) on January 11, 2026, and published by Patchstack on February 10, 2026, with CVE assignment and NVD publication on April 8, 2026. It carries a CVSS v3.1 base score of 7.5 (High), as assessed by CISA-ADP (Patchstack, GitHub Advisory).

The root cause is improper validation of user-supplied input used in PHP include or require statements within the Boutique WordPress theme (CWE-98). An attacker with at least Contributor-level privileges can manipulate a filename parameter to cause the PHP interpreter to include arbitrary local files from the server's filesystem. The attack is delivered over the network but requires high attack complexity and low-level authenticated access (Contributor or Developer role), with no user interaction needed. No public proof-of-concept exploit code has been identified at this time (Patchstack, GitHub Advisory).

Successful exploitation allows an authenticated attacker to include arbitrary local files on the web server, potentially exposing sensitive configuration files such as wp-config.php (containing database credentials), API keys, and other confidential data. In certain server configurations, LFI can be escalated to remote code execution by including files containing attacker-controlled PHP code (e.g., uploaded files or log files). The full impact spans high confidentiality, integrity, and availability loss on the affected WordPress installation (Patchstack, GitHub Advisory).

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 0.053% (0.147% per GitHub Advisory), placing it in the 35th percentile for exploitation likelihood within 30 days. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Exploitation requires at least Contributor-level WordPress privileges and high attack complexity, which limits opportunistic mass exploitation (Patchstack, GitHub Advisory).

The primary remediation is to upgrade the kutethemes Boutique WordPress theme to a version beyond 2.3.3 once a patched release becomes available. As of the advisory publication, no official patched version had been released; site owners should monitor the theme's update channel and apply patches immediately upon availability. As an interim measure, consider disabling or removing the Boutique theme if it is not critical to site operation. Additionally, deploying a Web Application Firewall (WAF) with rules targeting file inclusion patterns and restricting Contributor/Editor role permissions can reduce exposure (Patchstack, GitHub Advisory).