CVE-2026-57805 in Tonda Plugin
Summary
by MITRE • 07/13/2026
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in Select-Themes Tonda tonda allows PHP Local File Inclusion.This issue affects Tonda: from n/a through <= 2.5.
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Analysis
by VulDB Data Team • 07/13/2026
The vulnerability described represents a critical improper control of filename for include/require statements in PHP applications, commonly classified as PHP Remote File Inclusion or Local File Inclusion depending on the attack vector. This weakness falls under CWE-98 which specifically addresses the improper control of filename for include/require statements, making it a fundamental security flaw that can lead to arbitrary code execution. The vulnerability exists within the Select-Themes Tonda tonda theme where user input is directly incorporated into PHP include or require statements without proper sanitization or validation, creating an exploitable condition that allows attackers to manipulate the file inclusion process.
The technical flaw manifests when the application accepts user-controllable parameters that are then passed directly to PHP's include or require functions. This allows malicious actors to specify arbitrary file paths or URLs that get executed within the context of the web application. In the case of Tonda theme version 2.5 and earlier, attackers can exploit this by manipulating parameters that control which files get included, potentially leading to local file inclusion attacks where sensitive system files can be read or remote code execution through URL inclusion. The vulnerability directly impacts the principle of least privilege and input validation, as the application fails to properly sanitize user-supplied data before using it in file operations.
Operationally, this vulnerability creates significant risk for affected systems as it enables attackers to execute arbitrary PHP code on the server, potentially leading to complete system compromise. Attackers can leverage this weakness to read sensitive files such as configuration files, database credentials, or other system resources that may contain authentication tokens or other critical information. The impact extends beyond simple data theft as successful exploitation can result in persistent backdoor access, data manipulation, or service disruption. This vulnerability aligns with ATT&CK technique T1505.003 for PHP remote file inclusion and represents a common vector for initial compromise in web application attacks.
Mitigation strategies should focus on implementing strict input validation and sanitization practices that prevent user-controllable data from being used in include/require statements. The recommended approach involves using allowlists of permitted values instead of accepting arbitrary input, implementing proper parameter validation, and ensuring that all file inclusion operations use absolute paths rather than relative paths or user-supplied inputs. Additionally, disabling remote file inclusion features in PHP configuration through setting allow_url_include to false provides an additional layer of protection. Security patches should be applied immediately to update the Tonda theme to versions that address this vulnerability, and regular security audits should verify that no other similar weaknesses exist within the application codebase. The implementation of Web Application Firewall rules that can detect and block suspicious include/require patterns also serves as an effective defensive measure against exploitation attempts.