CVE-2026-39522: Solene Path Traversal Vulnerability

CVE-2026-39522 Overview

CVE-2026-39522 is an unauthenticated Local File Inclusion (LFI) vulnerability affecting the Solene WordPress theme in versions 3.4 and earlier. The flaw is classified under [CWE-98], improper control of filename for include/require statement in a PHP program. Remote attackers can supply crafted input to include arbitrary local files on the server without authentication. Successful exploitation can lead to disclosure of sensitive files, configuration data, and in some PHP environments, code execution through log poisoning or session file inclusion. The vulnerability is tracked through the Patchstack Solene Theme Vulnerability database.

Critical Impact
Unauthenticated attackers can read arbitrary files on the WordPress host, exposing credentials in wp-config.php and potentially escalating to remote code execution.

Affected Products

Solene WordPress theme versions <= 3.4
WordPress installations using the Solene theme
PHP-based web servers hosting the vulnerable theme

Discovery Timeline

2026-06-17 - CVE-2026-39522 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-39522

Vulnerability Analysis

The vulnerability is a Local File Inclusion flaw [CWE-98] in the Solene WordPress theme. The theme accepts user-controlled input and passes it into a PHP include or require statement without proper validation or sanitization. Attackers can traverse the filesystem using sequences such as ../ to load files outside the intended directory.

Because the issue is unauthenticated, no valid WordPress session or credentials are required. An attacker only needs network access to the affected site to trigger the inclusion. The EPSS score for this CVE is 0.423%, with a percentile of 33.7, indicating measurable but not widespread exploitation interest at present.

Root Cause

The root cause is improper neutralization of filename input used in PHP file inclusion calls. The Solene theme dynamically constructs file paths from request parameters and includes them at runtime. Without an allowlist or normalization step, attacker-supplied values are dereferenced as file paths on the server.

Attack Vector

The attack vector is network-based. Exploitation requires the attacker to issue an HTTP request to a vulnerable endpoint within the Solene theme. The high attack complexity reflects environment-specific conditions, such as PHP configuration directives (allow_url_include, open_basedir) and the presence of useful target files. When conditions align, attackers can read sensitive files such as wp-config.php, /etc/passwd, or PHP session files, and chain inclusion with log poisoning to achieve code execution.

No verified public exploit code is available at this time. See the Patchstack Solene Theme Vulnerability advisory for additional technical details.

Detection Methods for CVE-2026-39522

Indicators of Compromise

HTTP requests to Solene theme endpoints containing path traversal sequences such as ../, ..%2f, or encoded null bytes.
Web server log entries showing parameter values referencing system files like wp-config.php, /etc/passwd, or /proc/self/environ.
Unexpected PHP include/require warnings in error logs referencing attacker-controlled paths.
Outbound connections or file reads from the web server process to unusual locations following suspicious requests.

Detection Strategies

Inspect access logs for query strings containing directory traversal patterns targeting the Solene theme directory under wp-content/themes/solene/.
Deploy Web Application Firewall (WAF) rules that flag LFI patterns in request parameters.
Monitor PHP error logs for inclusion failures referencing non-theme paths.
Correlate file read events on the web server with HTTP requests to the affected theme.

Monitoring Recommendations

Alert on read access to wp-config.php and other sensitive configuration files by the web server process outside expected workflows.
Track repeated 4xx or 5xx responses from Solene theme URLs that may indicate exploitation probing.
Baseline normal request parameters to the theme and alert on anomalous values containing path characters.

How to Mitigate CVE-2026-39522

Immediate Actions Required

Identify all WordPress sites running the Solene theme version 3.4 or earlier and prioritize them for remediation.
Deactivate the Solene theme until a patched version is installed if active exploitation is suspected.
Apply WAF rules blocking path traversal payloads against theme endpoints.
Rotate any credentials stored in wp-config.php if file disclosure is suspected.

Patch Information

Refer to the Patchstack Solene Theme Vulnerability advisory for the latest fixed version and update guidance. Upgrade the Solene theme to a version newer than 3.4 as soon as the vendor releases a patched build.

Workarounds

Restrict PHP open_basedir to confine file includes to the WordPress installation directory.
Set allow_url_include=Off and allow_url_fopen=Off in php.ini to limit remote inclusion vectors.
Use a WAF or reverse proxy rule set to block requests containing ../, ..%2f, or null byte sequences targeting the theme.
Replace the Solene theme with an alternative until a fixed release is published.

bash

# Configuration example: harden php.ini against LFI exploitation
allow_url_include = Off
allow_url_fopen = Off
open_basedir = "/var/www/html:/tmp"
disable_functions = "exec,passthru,shell_exec,system,proc_open,popen"