CVE-2026-67395 in Employee Self Service
Summary
by MITRE • 09/01/2026
A path traversal vulnerability exists in Sage Employee Self Service’s custom logo functionality due to improper validation of file path parameters. By leveraging directory traversal sequences and their encoded variants, an attacker may bypass directory restrictions and access files outside the application's intended file system scope. Successful exploitation would require knowledge of valid file names and paths.
Depending on the privileges of the affected component, exploitation could result in the disclosure of sensitive information, including configuration files, environment settings, application assets, and log data.
The vulnerability has been remediated through enhanced path validation and secure path resolution controls that prevent access to unauthorised locations.
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Analysis
by VulDB Data Team • 09/01/2026
A critical security flaw identified within Sage Employee Self Service involves a path traversal vulnerability located in the custom logo functionality of the application. This weakness stems from insufficient input validation regarding file path parameters, allowing an attacker to manipulate these inputs to bypass intended directory restrictions. By utilizing standard directory traversal sequences such as dot-dot-slash or their encoded variants, it is possible for a malicious actor to navigate outside the designated web root and access files residing in other parts of the server's file system. This type of vulnerability typically falls under CWE-22 Improper Limitation of a Pathname to a Restricted Directory, which highlights the failure to enforce strict boundaries on user-supplied paths during file operations.
The operational impact of this vulnerability is significant depending on the privileges associated with the affected component and the specific configuration of the hosting environment. Successful exploitation enables an attacker to read arbitrary files from the server, potentially leading to the disclosure of sensitive information. This includes critical configuration files that may contain database credentials or API keys, environment settings that reveal internal network structures, application assets such as source code snippets, and log data that might expose user activity patterns or system errors. Such unauthorized access can serve as a stepping stone for further attacks, including remote code execution if combined with other vulnerabilities like file upload flaws or deserialization issues. The attack vector aligns with ATT&CK technique T1083 File and Directory Discovery, where adversaries explore the target's filesystem to gather intelligence necessary for subsequent phases of an intrusion campaign.
Exploitation of this flaw requires a degree of reconnaissance by the attacker, specifically knowledge of valid file names and paths on the target system. While directory traversal attacks can sometimes be automated using wordlists containing common configuration files like etc/passwd or web.config, precise targeting increases the likelihood of success and reduces noise in network traffic that might trigger intrusion detection systems. The ability to read these restricted resources compromises the confidentiality integrity pillar of information security, potentially leading to data breaches regulatory non-compliance such as GDPR or HIPAA violations if personal identifiable information is exposed through log files or configuration dumps.
To mitigate this vulnerability, developers have implemented enhanced path validation mechanisms and secure path resolution controls within the application codebase. These remediations ensure that any file path provided by a user is normalized and verified against an allowlist of permitted directories before being processed by the underlying operating system's file handling routines. Best practices for preventing such vulnerabilities include using canonicalization functions to resolve symbolic links and relative paths, strictly validating input against expected patterns, and employing chroot jails or containerized environments to limit the scope of accessible files. Additionally, implementing principle of least privilege ensures that even if an attacker manages to traverse directories, they cannot access sensitive system-level resources due to restricted file permissions on the server side.