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 and a CVSS Vector of CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N allows an unauthenticated attacker to execute arbitrary HTML or JavaScript code on a victims browser which has high impact to confidentiality, high 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/router version prior to 1.23.2. and react-router 7.0.0 through 7.11.0, React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unstable RSC modes can result in unsafe URLs causing unintended javascript execution on the client. This is only an issue if you are creating redirect paths from untrusted content or via an open redirect. There is no impact if Declarative Mode (<BrowserRouter>) is being used. This issue has been patched in @remix-run/router version 1.23.2 and react-router version 7.12.0.