CVE-2026-64872 in Cache Cleaner Pro Plugin
Summary
by MITRE • 07/23/2026
Custom purge and log paths could escape the site webroot directory.
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Analysis
by VulDB Data Team • 07/23/2026
This vulnerability represents a critical path traversal flaw that allows attackers to bypass intended directory restrictions and access arbitrary files on the server. The issue occurs when custom purge and log paths are configured without proper validation or sanitization of user input, enabling malicious actors to manipulate file system access through crafted paths that escape the designated webroot directory. Such vulnerabilities fall under the CWE-22 category known as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", which is classified as a high-severity weakness in software security.
The technical implementation of this flaw typically involves insufficient input validation where user-supplied paths are directly used in file system operations without proper sanitization or directory restriction enforcement. Attackers can exploit this by crafting malicious path sequences such as ../ or ..\ that traverse up the directory tree, potentially accessing sensitive system files, configuration data, or other resources outside the intended webroot boundaries. The vulnerability is particularly dangerous because it can be leveraged to read system files, execute arbitrary code, or cause denial of service conditions depending on the system's access controls and the attacker's objectives.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can provide attackers with a foothold for further exploitation within the system. When combined with other vulnerabilities or misconfigurations, this path traversal weakness can lead to complete system compromise, data exfiltration, or persistent backdoor establishment. The attack surface is particularly concerning in web applications where administrators might configure custom logging or purging functions that are not properly secured against malicious input manipulation.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and sanitization at multiple levels of the application stack. The recommended approach involves applying strict path validation that ensures all file system operations occur within designated safe directories, using techniques such as canonicalizing paths and maintaining whitelist validation of allowed directory access. Organizations should implement proper access controls and privilege separation to minimize potential damage from successful exploitation attempts. Additionally, following secure coding practices as outlined in the OWASP Top Ten and applying principle of least privilege configurations can significantly reduce the risk associated with path traversal vulnerabilities. The ATT&CK framework categorizes this type of vulnerability under T1059 for Command and Scripting Interpreter and T1566 for Phishing, highlighting the potential for exploitation through various attack vectors that leverage such path traversal weaknesses to establish persistent access within compromised systems.