Executive Summary

This vulnerability exists in wger, a free, open-source workout and fitness manager, in versions 2.5 and below. The issue arises because the attribution_link property in AbstractLicenseModel constructs HTML by directly inserting user-controlled license fields, such as license_author, without properly escaping them. Additionally, the templates render this HTML using Django's |safe filter, which allows the inserted content to be interpreted as code rather than plain text.

An authenticated user can exploit this by creating an ingredient with a malicious license_author value containing JavaScript code. When any visitor views the ingredient page, this JavaScript executes in their browser, resulting in a stored Cross-Site Scripting (XSS) attack.

Useful 0 Not Useful 0

Impact Analysis

This stored XSS vulnerability can allow attackers to execute arbitrary JavaScript in the browsers of users who visit the affected ingredient pages. Potential impacts include theft of user session cookies, defacement of the website, redirection to malicious sites, or performing actions on behalf of the user without their consent.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate this vulnerability, upgrade wger to version 2.5 or later, where the issue has been fixed.

Useful 0 Not Useful 0