CVE-2026-109695 in FluentCart Plugin
Summary
by MITRE • 10/15/2026
Insertion of Sensitive Information Into Sent Data vulnerability in WPManageNinja FluentCart fluent-cart allows Retrieve Embedded Sensitive Data.This issue affects FluentCart: from n/a through 1.7.1.
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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 WPManageNinja FluentCart plugin represents a significant security flaw that compromises the confidentiality of user and transactional data. This specific weakness, which affects versions of FluentCart from n/a through 1.7.1, allows attackers to retrieve embedded sensitive data by exploiting how the application handles and transmits information during normal operations. The core technical issue lies in the improper sanitization or filtering mechanisms applied before data is sent out via HTTP requests, API responses, or email notifications. When developers fail to strip or mask confidential fields such as credit card numbers, social security numbers, full names, addresses, or authentication tokens prior to transmission, this information becomes accessible to unintended parties. This flaw aligns with CWE-209, which describes the generation of error messages containing sensitive information, and more broadly with CWE-359 regarding exposure of private information through sent data. The vulnerability essentially creates a side-channel where internal system states or user-specific secrets are inadvertently leaked into external communications that may be logged by web servers, proxied through insecure networks, or intercepted via man-in-the-middle attacks if TLS is not strictly enforced and validated.
From an operational perspective, the impact of this vulnerability extends beyond simple data leakage to potential regulatory non-compliance and severe reputational damage for businesses utilizing FluentCart. Since e-commerce platforms handle high volumes of personally identifiable information (PII) and financial details, any exposure can lead to violations of standards such as PCI DSS or GDPR. Attackers who successfully exploit this flaw do not necessarily need direct access to the database; instead, they can passively monitor network traffic or analyze server logs that capture outgoing requests containing these sensitive payloads. This lowers the barrier for entry significantly compared to traditional injection attacks, making it a high-risk vulnerability even if no immediate exploitation tool exists in public repositories. The presence of embedded credentials or session tokens within sent data could also facilitate further attacks such as session hijacking or privilege escalation, thereby escalating the threat from information disclosure to full system compromise.
To mitigate this risk, developers and site administrators must prioritize strict input validation and output encoding practices across all modules that handle user-provided content. Specifically, any field designated as sensitive should be masked in logs, emails, and API responses using techniques such as partial masking or complete removal before transmission. Implementing a Content Security Policy (CSP) can help mitigate some aspects of data leakage by controlling how resources are loaded and displayed, although it does not directly prevent server-side data exposure. For users running affected versions, immediate upgrading to the latest patched version of FluentCart is the primary remediation strategy recommended by WPManageNinja. Additionally, organizations should conduct a thorough audit of their HTTP traffic logs to determine if any sensitive information has already been exposed through this vector in previous deployments. Enforcing HTTPS with strict certificate validation ensures that even if data is transmitted, it remains encrypted during transit, reducing the window of opportunity for network-based interception attacks as defined by MITRE ATT&CK technique T1048, which covers Exfiltration Over Alternative Protocol mechanisms where attackers might abuse legitimate services to steal data.