Description

Unauthenticated Cross Site Scripting (XSS) in URL Shortify <= 2.5.0 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.1",
  "pubDate": "2026-08-18T15:17:04.670Z",
  "pubdate": "2026-08-18T15:17:04.670Z",
  "executiveSummary": "An unauthenticated Cross-Site Scripting (XSS) vulnerability has been identified in the URL Shortify plugin, specifically affecting versions 2.5.0 and prior. This security flaw allows remote, unauthenticated attackers to inject malicious client-side scripts, typically JavaScript, into vulnerable parameters processed by the application. When an unsuspecting user interacts with the crafted URL or views the affected component, the malicious payload executes within the context of their browser session. The risk implications include potential session hijacking, unauthorized actions performed on behalf of the victim, theft of sensitive authentication cookies, and defacement of the affected web application. Exploitation requires no prior authentication or elevated privileges, making it accessible to external threat actors over the network. Remediation requires updating the URL Shortify product to a patched version beyond 2.5.0 once available, alongside the implementation of robust input sanitization and contextual output encoding mechanisms across all vulnerable endpoints.",
  "technicalDetails": "The vulnerability resides in the request handling and output rendering logic of the URL Shortify product for versions <= 2.5.0. The root cause stems from insufficient input validation and a lack of proper output encoding on user-supplied parameters processed by the application. Specifically, the software fails to properly sanitize malicious strings containing HTML tags or JavaScript event handlers before reflecting them back to the user or storing them within the application state.\nNetwork exposure is external, as the vulnerable endpoints are accessible over standard web protocols (HTTP/HTTPS) without requiring any pre-existing authentication requirements or privilege requirements. An attacker with network access can craft a malicious Uniform Resource Locator (URL) containing an arbitrary JavaScript payload destined for the vulnerable parameter.\nThe attack flow proceeds as follows: First, the unauthenticated attacker crafts a malicious link targeting the vulnerable endpoint in URL Shortify, embedding the XSS payload within the unvalidated parameter. Second, the attacker induces a victim, such as an authenticated administrator or standard user, to click the malicious link or visit the compromised resource over the network. Third, the server processes the incoming HTTP request and improperly reflects or renders the unsanitized input within the HTTP response body without adequate contextual output encoding. Fourth, the victim's browser parses the HTTP response, interprets the injected payload as executable script content rather than inert text, and executes the payload within the security context of the victim's session.\nThe payload behavior involves executing arbitrary JavaScript in the Document Object Model (DOM) of the victim's browser. Post-exploitation impact encompasses session token theft, credential harvesting, unauthorized redirection to malicious external sites, and the execution of arbitrary administrative actions if the victim holds privileged access within the application."
}