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.
The vulnerability has been classified with a CVSS base score of 4.7, indicating a medium severity. It is crucial for organizations using vulnerable versions of Kanboard to understand the implications of this vulnerability.
Risk to organizations includes potential phishing attacks and credential theft, which could lead to unauthorized access and data breaches. Organizations should prioritize patching immediately.
As of now, there are no known exploits or public proof of concept available for this vulnerability. However, the risk remains significant, and organizations should schedule remediation as part of their security practices.
In conclusion, organizations must take proactive measures to update their systems and mitigate the risks associated with this vulnerability.
For further information, refer to the Kanboard security advisory.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Vulnerability Details
CVE-2026-21879 is described as a vulnerability in Kanboard, which is a project management tool using Kanban methodology. The specific vulnerability allows for an Open Redirect attack.
The vulnerability affects all versions of Kanboard prior to 1.2.49. The vulnerability is classified under CWE-601.
The CVSS score provided by the NVD for this vulnerability is 6.1, indicating a medium severity level with potential impacts on confidentiality and integrity.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of user input, specifically in URL validation. The attack vector is network-based, requiring user interaction to trigger the redirect.
The attack complexity is considered low, as it requires no privileges and relies on user interaction to click the crafted link.
The impact of this vulnerability is primarily on confidentiality, as attackers may redirect users to malicious sites that could harvest sensitive information.
Risk & Impact Analysis
The risk to organizations includes not only potential phishing attacks but also the exploitation of user credentials and the distribution of malware. Given the nature of the vulnerability, the blast radius could be significant, especially if the application is widely used within an organization.
Organizations should assess their exposure to this vulnerability and prioritize their patch management processes to mitigate risks.
The urgency for remediation is classified as high due to the potential impacts on user data and organizational security.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch (1.2.49) are affected by this vulnerability.
Mitigation & Remediation
Organizations should upgrade to Kanboard version 1.2.49 or later to mitigate this vulnerability. If an immediate patch cannot be applied, consider implementing workarounds or additional network controls to limit exposure.
Configuration hardening should also be performed to reduce the attack surface. Regular monitoring and security assessments can help identify any potential weaknesses that may arise from this vulnerability.
Detection Guidance
Monitor logs for unusual redirect patterns or attempts to access untrusted URLs. Keep an eye out for behavioral anomalies that may indicate an exploit attempt.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of robust input validation in web applications. Security teams should ensure that user-generated content is properly sanitized to mitigate risks associated with URL manipulations.
Analyzing trends in vulnerabilities like CVE-2026-21879 can provide insights into the evolving threat landscape and help organizations strengthen their security posture.
For organizations utilizing Kanboard, vigilance in patch management and a proactive approach to security assessments are critical in minimizing risks.
For more information on vulnerability management, refer to the AppSecure resources.
Organizations should validate remediation through vulnerability management programs to ensure comprehensive security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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