Description

Unauthenticated Cross Site Scripting (XSS) in Ninja Tables <= 5.2.9 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.1",
  "pubDate": "2026-08-06T15:17:14.323Z",
  "pubdate": "2026-08-06T15:17:14.323Z",
  "executiveSummary": "An unauthenticated Cross-Site Scripting (XSS) vulnerability has been identified in the Ninja Tables plugin, specifically affecting versions 5.2.9 and prior. This security flaw enables remote, unauthenticated threat actors to inject malicious JavaScript payloads into web pages rendered by the vulnerable software. The primary impact of this vulnerability involves the execution of arbitrary script code in the context of a victim's browser session when they visit an affected page. Risk implications include potential session hijacking, unauthorized access to sensitive data, and defacement or manipulation of the hosting WordPress site's content. Exploitation requires no prior authentication or administrative privileges, allowing any external attacker with network access to the target web application to trigger the flaw. The vulnerability stems from improper neutralization of user-supplied input before it is rendered to the user interface, permitting the persistence or reflection of malicious scripts. Remediation requires updating the affected plugin to a patched version beyond 5.2.9 as soon as releases become available by the vendor.",
  "technicalDetails": "The vulnerability is classified as an Unauthenticated Cross-Site Scripting (XSS) flaw impacting the Ninja Tables product in versions 5.2.9 and below. The root cause of the security issue lies in the inadequate sanitization and validation of input parameters handled by the vulnerable component within the plugin. Because proper output encoding or input filtering is absent or insufficiently implemented, malicious actors can supply crafted strings containing executable JavaScript or HTML markup that gets accepted and subsequently stored or reflected by the application.\nThe attack flow begins with a remote attacker crafting a malicious payload containing arbitrary JavaScript. Since the vulnerability requires zero authentication and involves no privilege requirements, the attacker interacts directly over the network via standard HTTP or HTTPS protocols against the exposed endpoint handling table creation, data input, or rendering functions. The unauthenticated request delivers the payload into the application data flow where it lacks proper sanitization.\nWhen a user or administrator subsequently browses the web page containing the vulnerable Ninja Tables component, the application outputs the raw, unescaped payload directly into the Document Object Model (DOM). The victim's browser interprets the injected markup as legitimate script execution, running the payload within the security context of the victim's active session. Payload behavior can range from simple proof-of-concept alert executions to advanced post-exploitation actions, such as stealing session cookies, capturing keystrokes, performing unauthorized administrative actions via forged requests, or redirecting users to external malicious infrastructure.\nThe network exposure is direct, as the attack vector is exploitable over the public internet wherever the vulnerable plugin renders data tables accessible to visitors or users. Due to the lack of authentication constraints, automated scanners or spear-phishing campaigns can mass-exploit vulnerable instances without needing prior knowledge of internal credentials or system architecture."
}