CVE-2026-115611 in TableOn Plugin
Summary
by MITRE • 10/29/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in PluginUs.Net TableOn posts-table-filterable allows Reflected XSS.This issue affects TableOn: from n/a through 1.0.7.
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Analysis
by VulDB Data Team • 10/29/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting or XSS. Specifically, this vulnerability manifests as a Reflected XSS within the PluginUs.Net TableOn component, targeting the posts-table-filterable functionality. This type of attack occurs when an application receives data from users via HTTP requests and immediately includes that unvalidated input in its response without proper sanitization or encoding. In the context of the affected software versions ranging from n/a through 1.0.7, the filter mechanism fails to adequately process user-supplied search terms or filter criteria before rendering them back into the HTML document structure.
From a technical perspective, the root cause lies in the server-side handling of input parameters associated with table filtering operations. When a victim interacts with the posts-table-filterable feature by entering specific text into a search field or selecting filter options, this data is transmitted to the server via GET or POST requests. The application logic retrieves these values and injects them directly into the HTML output stream without applying necessary encoding rules such as HTML entity encoding for special characters like angle brackets, ampersands, and quotes. Consequently, if an attacker crafts a malicious URL containing embedded JavaScript code within the filter parameter, this script is reflected back in the HTTP response and executed by the victim's web browser upon loading the page. This execution happens within the security context of the vulnerable website, granting the injected script full access to cookies, session tokens, local storage, and other sensitive data associated with that domain.
The operational impact of this vulnerability extends beyond simple defacement or nuisance alerts. Because it is a reflected XSS attack, exploitation typically requires social engineering tactics where an attacker lures a victim to click on a specially crafted link. Once executed, the malicious script can perform various harmful actions including session hijacking by stealing authentication cookies, credential harvesting through fake login forms injected into the page content, or redirecting users to phishing sites designed to mimic legitimate interfaces. In environments where administrative privileges are involved, successful exploitation could lead to complete compromise of the backend system if the victim is an administrator with elevated rights. This aligns directly with CWE-79, which categorizes improper neutralization of input during web page generation as a critical weakness in software security design and implementation.
Furthermore, this vulnerability maps closely to specific tactics within the MITRE ATT&CK framework for both browser-based attacks and initial access vectors. The exploitation technique corresponds to Client-side Scripting Injection under the Execution tactic, where attackers leverage scripts running on client devices to achieve their objectives. It also relates to Phishing via Link in the Initial Access category, as the delivery mechanism relies heavily on tricking users into visiting maliciously constructed URLs. Understanding these mappings is crucial for security teams aiming to detect and mitigate such threats using existing monitoring tools and behavioral analysis systems that look for anomalous script execution patterns or suspicious outbound traffic following user interactions with web forms.
To mitigate this vulnerability, developers must implement strict input validation and output encoding strategies across all versions of the TableOn plugin up to 1.0.7. Input validation should enforce allow-listing principles, ensuring that only expected data types and formats are accepted by the filter mechanism. More critically, output encoding must be applied consistently before any user-controllable data is rendered into HTML contexts. This involves converting special characters such as <, >, &, ", and ' into their corresponding HTML entities to prevent them from being interpreted as executable code by the browser. Additionally, implementing Content Security Policy headers can provide an additional layer of defense by restricting the sources from which scripts are allowed to load or execute, thereby limiting the impact even if a script injection attempt succeeds. Upgrading to patched versions that address this flaw is the most effective long-term solution for organizations relying on PluginUs.Net TableOn services.