Description

Metaphor Creations Ditty (ditty-news-ticker) before 3.1.70 contains a stored cross-site scripting vulnerability that allows authenticated users with Author-level privileges or higher to inject arbitrary HTML elements by supplying malicious wrapper attribute values in layout tags. The ditty_layout_render_tag_wrapper() function inserts caller-supplied wrapper attribute values directly as HTML element names without allowlist validation, bypassing wp_kses_post() sanitization because KSES runs at save time before layout tag attributes are resolved at render time, causing the payload to execute in the browser of any visitor viewing posts or pages embedding the affected Ditty item.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.4",
  "pubDate": "2026-09-21T15:17:35.617Z",
  "pubdate": "2026-09-21T15:17:35.617Z",
  "executiveSummary": "Metaphor Creations Ditty (ditty-news-ticker) versions prior to 3.1.70 contain a critical stored cross-site scripting (XSS) vulnerability. This flaw allows authenticated users with Author-level privileges or higher to inject malicious HTML and JavaScript into the application via layout tag attributes.\nThe vulnerability resides in the rendering logic, which fails to validate wrapper attribute values. Because the application processes these attributes after initial sanitization stages, an attacker can bypass security controls to inject arbitrary HTML elements.\nSuccessful exploitation results in the execution of unauthorized scripts within the browser of any user viewing a page or post containing the affected Ditty item. This poses a significant risk to site integrity, potentially leading to unauthorized actions, session hijacking, or the distribution of malicious content. Mitigation requires updating to version 3.1.70 or later, as this ensures proper validation of wrapper elements before they are parsed and rendered by the client.",
  "technicalDetails": "The root cause of this vulnerability is improper input validation within the ditty_layout_render_tag_wrapper() function. In the affected versions of Ditty, this function retrieves attribute values defined within layout tags and dynamically inserts them into the DOM as HTML element names without subjecting the input to an allowlist validation process.\nThe exploitation mechanism leverages a failure in the sequence of security operations. The WordPress wp_kses_post() function, which is designed to sanitize HTML output, is executed at save time. However, the malicious payload is contained within wrapper attributes that are not fully resolved until the rendering phase. Because the rendering logic processes these attributes after the initial KSES sanitization has completed, the injected payload effectively bypasses the existing security filters.\nAn attacker with Author-level privileges or higher can manipulate the wrapper attribute values to inject non-standard or malicious HTML elements. For example, by supplying a crafted string, an attacker can force the application to render arbitrary elements or attributes that the browser interprets as executable code. Once the Ditty item is saved, the malicious configuration is stored in the database.\nThe attack flow proceeds as follows: First, an authenticated user with appropriate permissions modifies a Ditty layout, inserting a malicious payload into the wrapper attribute field. Second, when a site visitor navigates to any page or post embedding this Ditty item, the server-side code triggers the ditty_layout_render_tag_wrapper() function to generate the front-end display. Third, the function renders the unvalidated attribute value directly into the HTML output. Finally, the victim's browser parses the manipulated HTML, resulting in the execution of the injected script in the context of the user's session.\nThis vulnerability is classified as stored XSS because the malicious payload is persisted within the site's database, ensuring it is triggered every time the affected Ditty item is rendered, regardless of the individual user interacting with the content. The post-exploitation impact includes the potential for session token theft, unauthorized administrative actions performed on behalf of the victim, and persistent defacement of the affected pages."
}