Description

Unauthenticated Cross Site Scripting (XSS) in SimplyRETS Real Estate IDX <= 3.2.8 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.1",
  "pubDate": "2026-08-19T13:18:07.250Z",
  "pubdate": "2026-08-19T13:18:07.250Z",
  "executiveSummary": "An unauthenticated Cross-Site Scripting (XSS) vulnerability has been identified in the SimplyRETS Real Estate IDX plugin, specifically affecting versions 3.2.8 and prior. This security flaw enables remote attackers to inject malicious client-side scripts, typically JavaScript, into web pages rendered to unsuspecting end users visiting the affected WordPress site.\nThe vulnerability exposes the application to risks such as session hijacking, credential theft, DOM manipulation, and redirection to malicious external domains. Because the vulnerability is unauthenticated, exploitation requires no prior privileges or interaction with a legitimate user account beyond inducing the victim to interact with a crafted URL or payload.\nThe impact compromises the integrity and confidentiality of user sessions interacting with the real estate platform, potentially leading to widespread compromise of site visitors. Defensive measures require immediate attention to vendor advisories and input sanitization controls within the affected plugin infrastructure.",
  "technicalDetails": "The vulnerability resides in the input handling and output rendering mechanisms of the SimplyRETS Real Estate IDX plugin for versions <= 3.2.8. The root cause stems from the lack of proper input sanitization and output encoding for user-supplied parameters processed by the plugin before reflecting them back in the Hypertext Markup Language (HTML) response.\nNetwork exposure is explicitly public, as the vulnerable endpoints are accessible over standard web protocols (HTTP/HTTPS) without requiring any authentication or authorization checks. Attackers do not require administrative privileges, special roles, or prior system access to initiate the attack vector.\nThe exploitation flow proceeds as follows: First, the attacker identifies an input parameter processed by the SimplyRETS Real Estate IDX plugin that fails to sanitize malicious strings properly. Second, the attacker crafts a malicious Uniform Resource Locator (URL) containing an arbitrary JavaScript payload encapsulated within HTML tags or event handlers. Third, the attacker induces a victim to click the crafted link or browse to the maliciously constructed URL via social engineering or other delivery mechanisms. Fourth, the vulnerable web server processes the request, embeds the unsanitized parameter directly into the Document Object Model (DOM) of the generated web page, and serves it to the victim's browser. Finally, the victim's browser parses the HTTP response and executes the injected script within the security context of the origin site, granting the attacker access to session tokens, cookies, and local storage.\nPost-exploitation impact includes the execution of arbitrary JavaScript in the victim's browser session, enabling session hijacking, bypassing CSRF protections, defacing the real estate platform interface, or performing unauthorized actions on behalf of the authenticated user."
}