CVE-2026-21884

This High severity DOM-based XSS vulnerability was introduced in version 7.1.0 of Crowd Data Center. This DOM-based XSS vulnerability, with a CVSS Score of 8.2 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N allows an unauthenticated attacker to execute arbitrary HTML or JavaScript code on a victims browser which has high impact to confidentiality, low impact to integrity, no impact to availability, and requires user interaction. Atlassian recommends that Crowd Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: * Crowd Data Center 7.1: Upgrade to a release greater than or equal to 7.1.5 See the release notes (https://confluence.atlassian.com/crowd/crowd-release-notes-199094.html). You can download the latest version of Crowd Data Center from the download center (https://www.atlassian.com/software/crowd/download-archive). The National Vulnerability Database provides the following description for this vulnerability: React Router is a router for React. In @remix-run/react version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, a XSS vulnerability exists in in React Router's <ScrollRestoration> API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys. There is no impact if server-side rendering in Framework Mode is disabled, or if Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0.

EPSS 0.02% · 6.5th percentile