CVE-2026-12898 in All-in-One WP Migration and Backup Plugin
Summary
by MITRE • 07/20/2026
The All-in-One WP Migration and Backup WordPress plugin before 7.106 does not properly sanitise a user-supplied value before using it to build a file path, allowing unauthenticated attackers to create or append a log file in arbitrary locations outside its intended storage directory.
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Analysis
by VulDB Data Team • 07/20/2026
This vulnerability exists within the All-in-One WP Migration and Backup WordPress plugin version 7.106 and earlier, where improper input sanitisation creates a path traversal risk that can be exploited by unauthenticated attackers. The flaw occurs when user-supplied data is directly incorporated into file path construction without adequate validation or sanitisation measures, allowing malicious actors to manipulate the intended storage location of log files.
The technical implementation of this vulnerability stems from the plugin's failure to properly validate and sanitise user inputs that are used in file system operations. When attackers can control parameters that influence file path creation, they gain the ability to write files outside of the designated plugin directories, potentially leading to arbitrary file creation or modification. This represents a classic path traversal vulnerability where the lack of proper input validation enables attackers to bypass intended security boundaries.
The operational impact of this vulnerability extends beyond simple file manipulation as it can enable more sophisticated attacks including log file poisoning, persistent backdoor installation, and potential privilege escalation within the affected WordPress environment. An unauthenticated attacker could leverage this weakness to inject malicious content into log files located in arbitrary system directories, potentially compromising the integrity of the entire WordPress installation or even the underlying server infrastructure.
From a security framework perspective, this vulnerability aligns with CWE-22 Path Traversal and CWE-73 Improper Neutralization of Special Elements in Output Used by a Downstream Component, while also mapping to ATT&CK technique T1059 Command and Scripting Interpreter for executing malicious code through compromised log files. The attack surface is particularly concerning as it affects a widely used plugin with default configurations that may not include additional protective measures.
Organizations should immediately update to version 7.106 or later of the All-in-One WP Migration and Backup plugin to remediate this vulnerability. Additionally, implementing proper input validation mechanisms, restricting file system permissions for WordPress directories, and monitoring for suspicious file creation activities can provide additional layers of protection. Regular security audits of WordPress plugins should include verification of input sanitisation practices and proper path handling to prevent similar vulnerabilities from being introduced in other components of the web application stack.
The vulnerability demonstrates the critical importance of input validation in preventing path traversal attacks within web applications, particularly those that handle file system operations. Proper implementation of security controls including parameterised inputs, secure file path construction, and comprehensive access control measures are essential for protecting WordPress installations from such exploitation vectors. Regular patch management combined with proactive security monitoring remains crucial for maintaining the integrity and confidentiality of web-based applications against persistent threats.