MantisBT before 1.3.11, 2.x before 2.3.3, and 2.4.x before 2.4.1 omits a backslash check in stringapi.php and consequently has conflicting interpretations of an initial \/ substring as introducing either a local pathname or a remote hostname, which leads to (1) arbitrary Permalink Injection via CSRF attacks on a permalinkpage.php?url= URI and (2) an open redirect via a login_page.php?return= URI.
{ "nvd_published_at": "2017-05-21T14:29:00Z", "cwe_ids": [ "CWE-352" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2025-04-22T18:44:43Z" }