Description yourls is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Remediation References CVE-2021-3783 Related Vulnerabilities Moodle Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2020-1691) MediaWiki Incorrect Permission Assignment for Critical Resource Vulnerability (CVE-2023-45364) MyBB Improper Neutralization of Special Elements used in a Command ('Command Injection') Vulnerability (CVE-2022-39265) OpenSSL Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2016-2183) SharePoint Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2026-20959) Severity Medium Classification CVE-2021-3783 CWE-707 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Tags Missing Update Known Vulnerabilities