CVE-2025-58896 in Otaku Plugin
Summary
by MITRE • 12/18/2025
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in AncoraThemes Otaku otaku allows PHP Local File Inclusion.This issue affects Otaku: from n/a through <= 1.8.0.
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Analysis
by VulDB Data Team • 12/18/2025
The CVE-2025-58896 vulnerability represents a critical PHP Remote File Inclusion flaw in the AncoraThemes Otaku theme, specifically impacting versions through 1.8.0. This vulnerability resides in the improper control of filename parameters within include/require statements, creating a pathway for remote attackers to execute arbitrary code on affected systems. The flaw fundamentally stems from inadequate input validation and sanitization of user-supplied parameters that are directly used in PHP's include or require functions, allowing malicious actors to manipulate the file inclusion process and potentially gain unauthorized access to the server.
The technical implementation of this vulnerability occurs when the Otaku theme accepts user-controllable input through parameters such as $_GET or $_POST variables and directly incorporates them into include/require statements without proper validation or sanitization. This creates a classic local file inclusion attack vector where an attacker can specify arbitrary local file paths or even remote URLs to be included and executed by the PHP interpreter. The vulnerability is particularly dangerous because it allows for the execution of arbitrary PHP code on the target server, potentially enabling full system compromise.
From an operational perspective, this vulnerability presents severe implications for WordPress sites using the affected Otaku theme. Attackers can leverage this flaw to execute malicious code, potentially leading to complete server compromise, data exfiltration, or deployment of backdoors. The impact extends beyond simple code execution as it can facilitate privilege escalation, lateral movement within network environments, and persistent access to compromised systems. Organizations running vulnerable versions face significant risk of unauthorized access and potential data breaches, particularly in environments where the theme is actively used and exposed to external traffic.
The vulnerability aligns with CWE-98, which specifically addresses Improper Control of Filename for Include/Require Statement, and maps to ATT&CK technique T1505.003 for Server Software Component, highlighting the exploitation of web application vulnerabilities for code execution. Mitigation strategies should include immediate patching of the Otaku theme to version 1.8.1 or later, where the vulnerability has been addressed through proper input validation and sanitization. Additionally, implementing web application firewalls, restricting file inclusion capabilities, and employing principle of least privilege for web server processes can provide additional defense layers. Security monitoring should focus on detecting unusual file inclusion patterns and unauthorized code execution attempts, while regular security audits of installed themes and plugins remain essential for maintaining secure WordPress environments.