CVE-2026-25326 in Content Composer Plugin
Summary
by MITRE • 02/19/2026
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in cmsmasters CMSMasters Content Composer cmsmasters-content-composer allows PHP Local File Inclusion.This issue affects CMSMasters Content Composer: from n/a through <= 1.4.5.
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Analysis
by VulDB Data Team • 02/22/2026
The CVE-2026-25326 vulnerability represents a critical PHP Remote File Inclusion flaw within the cmsmasters CMSMasters Content Composer plugin, specifically impacting versions through 1.4.5. This vulnerability stems from improper control of filename parameters in include/require statements, creating a pathway for malicious actors to execute arbitrary code on affected systems. The flaw exists in the plugin's handling of user-supplied input that is directly incorporated into PHP include directives, allowing attackers to manipulate the file inclusion process and potentially access local files or execute remote code. The vulnerability aligns with CWE-98, which describes improper control of code generation, and specifically manifests as a PHP Local File Inclusion (LFI) attack vector that bypasses normal input validation mechanisms. This issue fundamentally compromises the integrity of the CMSMasters Content Composer plugin by enabling unauthorized file access and code execution through crafted input parameters.
The technical exploitation of this vulnerability occurs when the plugin processes user-controllable input without proper sanitization or validation before using it in include/require statements. Attackers can manipulate parameters such as file paths or module names to redirect the include mechanism to load malicious files from local system directories or remote servers. The vulnerability's impact extends beyond simple file access, as successful exploitation can lead to complete system compromise through code execution. The affected range from n/a through version 1.4.5 indicates that all versions within this scope are potentially vulnerable, suggesting a widespread exposure across multiple installations. This type of vulnerability typically allows attackers to leverage the principle of least privilege by executing code with the permissions of the web server process, potentially leading to full system compromise or data exfiltration. The attack pattern follows established methods described in the MITRE ATT&CK framework under technique T1059.007 for PHP, where adversaries execute malicious code through web-based applications.
The operational impact of CVE-2026-25326 poses significant risks to organizations using affected cmsmasters CMSMasters Content Composer installations. Successful exploitation can result in unauthorized access to sensitive system files, database credentials, and potentially full system control. The vulnerability creates a persistent threat vector that can be exploited repeatedly, as the flawed code structure remains unchanged across the affected versions. Organizations may experience data breaches, service disruption, and compliance violations due to the exposure of sensitive information through local file inclusion attacks. The vulnerability also impacts the overall security posture by providing attackers with a foothold that can be used for further lateral movement within the network infrastructure. The lack of proper input validation in the include/require statements creates a fundamental security weakness that can be exploited by attackers with minimal technical expertise, making it particularly dangerous in environments where multiple systems may be exposed to the same vulnerability. This weakness directly contradicts security best practices outlined in OWASP Top 10 and other industry standards that emphasize the importance of input validation and secure coding practices.
Mitigation strategies for CVE-2026-25326 should prioritize immediate patching of the affected cmsmasters CMSMasters Content Composer plugin to versions that address the improper filename control issue. Organizations must implement proper input validation and sanitization mechanisms to prevent user-supplied data from being used directly in include/require statements. The recommended approach includes restricting file inclusion to predefined whitelists, implementing absolute path restrictions, and utilizing secure coding practices that avoid dynamic include statements with user-controllable parameters. Security measures should also include monitoring for suspicious file inclusion patterns and implementing web application firewalls to detect and block malicious requests. The vulnerability's nature makes it particularly susceptible to automated exploitation, therefore organizations should deploy intrusion detection systems and conduct regular security assessments to identify and remediate similar issues. Additionally, implementing proper access controls and privilege separation can limit the potential impact of successful exploitation attempts. Organizations should also consider implementing security headers and disabling dangerous PHP functions that could be leveraged in exploitation scenarios, as outlined in the OWASP Secure Coding practices and the NIST Cybersecurity Framework guidelines for web application security.