CVE-2026-110361 in Infinite Uploads Plugin
Summary
by MITRE • 10/15/2026
Insertion of Sensitive Information Into Sent Data vulnerability in ClikIT Infinite Uploads infinite-uploads allows Retrieve Embedded Sensitive Data.This issue affects Infinite Uploads: from n/a through 3.4.1.
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Analysis
by VulDB Data Team • 10/15/2026
The vulnerability identified as an insertion of sensitive information into sent data within the ClikIT Infinite Uploads plugin represents a critical failure in input validation and output sanitization mechanisms. This flaw allows attackers to inject malicious or unauthorized content that is subsequently processed by the server, leading to the retrieval of embedded sensitive data. The issue specifically affects versions of the Infinite Uploads plugin ranging from its initial release through version 3.4.1, indicating a long-standing exposure for users who have not applied updates or mitigations during this period.
From a technical perspective, this vulnerability stems from inadequate filtering of user-supplied input before it is stored in persistent storage or processed by the application logic. When an attacker submits data containing embedded sensitive information, such as metadata, hidden fields, or crafted file headers, the plugin fails to strip these elements or validate their integrity against expected formats. Consequently, when this data is later retrieved or displayed, the embedded sensitive content becomes accessible to unauthorized parties. This mechanism effectively bypasses standard security controls that rely on input sanitization to prevent information leakage and ensures that private details are exposed through normal application functionality.
The operational impact of this vulnerability is significant, particularly for websites relying on file uploads for legitimate purposes such as document sharing or media hosting. Attackers can exploit this flaw to exfiltrate confidential data embedded within uploaded files, including personal identifiable information, internal network configurations, or proprietary business documents. This compromise undermines the confidentiality and integrity guarantees expected from secure web applications. Furthermore, if the retrieved sensitive data includes authentication tokens or session identifiers stored in file metadata, it could facilitate further attacks such as account takeover or privilege escalation, thereby escalating the risk beyond simple data leakage to full system compromise.
In terms of industry standards, this vulnerability aligns with CWE-209, which describes the generation of error messages containing sensitive information, and more broadly with CWE-798, involving the use of hardcoded credentials or sensitive data in ways that expose them to attackers. It also relates to ATT&CK technique T1530, Data from Cloud Storage Objects, as it involves accessing and retrieving data stored within cloud-based file systems via exploited application logic. The lack of proper input validation places this flaw squarely within the category of injection vulnerabilities where untrusted data is treated as executable or trusted content by the receiving system.
To mitigate this vulnerability, administrators should immediately update the Infinite Uploads plugin to a version later than 3.4.1 if such an update has been released and addresses these specific flaws. For organizations unable to upgrade promptly, implementing strict file type restrictions and disabling PHP execution in upload directories can reduce the attack surface. Additionally, deploying Web Application Firewalls with rules designed to detect anomalous data patterns in uploaded files may help block exploitation attempts. Regular security audits focusing on input validation practices across all user-facing endpoints are essential to prevent similar issues from arising in other components of the application stack.