CVE-2026-21879
MEDIUMkanboard < 1.2.49 - Open Redirect via URL Validation Bypass
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2026-21879. PoCs published by HUSEYNKHANLI.
AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-21879, an open redirect vulnerability in Kanboard ≤1.2.48. The exploit leverages protocol-relative URLs to bypass URL validation and redirect users to attacker-controlled domains post-authentication.
Description
Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows malicious actors to redirect authenticated users to attacker-controlled websites. By crafting URLs such as //evil.com, attackers can bypass the filter_var($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49.
Exploits (1)
This repository contains a functional exploit for CVE-2026-21879, an open redirect vulnerability in Kanboard ≤1.2.48. The exploit leverages protocol-relative URLs to bypass URL validation and redirect users to attacker-controlled domains post-authentication.
References (3)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N