The issue is related to Improper Neutralization of Input During Web Page Generation, also known as Cross-site Scripting. This affects Apache Archiva, a product that is no longer supported by its maintainer. As a result, no fix is planned for this issue. Users are advised to find an alternative or restrict access to the instance to trusted users. An additional mitigation measure is to configure an HTTP proxy in front of the Archiva instance to filter out requests with malicious characters in the URL.