Cross-Site Request Forgery (CSRF)
Cross-site request forgery (CSRF) vulnerability in index.php in FlatNuke 2.6, and possibly 3, allows remote attackers to change the password and privilege level of arbitrary accounts via the user parameter and modified (1) regpass and (2) level parameters in a none_Login action, as demonstrated by using a Flash object to automatically make the request.
CWE-352 - Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) is a vulnerability that allows an attacker to make arbitrary requests in an authenticated vulnerable web application and disrupt the integrity of the victim’s session. The impact of a successful CSRF attack may range from minor to severe, depending upon the capabilities exposed by the vulnerable application and privileges of the user. An attacker may force the user to perform state-changing requests like transferring funds, changing their email address or password etc. However, if an administrative level account is affected, it may compromise the whole web application and associated sensitive data.