Description
The is_safe_url function in utils/http.py in Django 1.4.x before 1.4.6, 1.5.x before 1.5.2, and 1.6 before beta 2 treats a URL's scheme as safe even if it is not HTTP or HTTPS, which might introduce cross-site scripting (XSS) or other vulnerabilities into Django applications that use this function, as demonstrated by "the login view in django.contrib.auth.views" and the javascript: scheme.
Remediation
References
Related Vulnerabilities
WordPress Cross-Site Scripting Vulnerability (0.70 - 3.7.11)
CubeCart Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2011-3724)
Roundcube Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2020-12626)
WordPress Plugin Evarisk 'uploadPhotoApres.php' Arbitrary File Upload (5.1.5.4)
WordPress Plugin WordPress Calls to Action Unspecified Vulnerability (2.3.5)