Description yourls is vulnerable to Improper Restriction of Rendered UI Layers or Frames Remediation References CVE-2021-3734 Related Vulnerabilities WordPress Plugin Kish Guest Posting 'uploadify.php' Arbitrary File Upload (1.2) WordPress Plugin WP-UserAgent Cross-Site Scripting (1.0.5) WordPress Plugin Jigoshop Multiple Unspecified Vulnerabilities (1.17.13) Apache HTTP Server Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2005-3352) Moodle Improper Access Control Vulnerability (CVE-2016-3733) Severity High Classification CVE-2021-3734 CWE-1021 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Tags Missing Update Known Vulnerabilities