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Vulnerability DatabaseCVE-2021-3989
CVE-2021-3989:
PHP vulnerability analysis and mitigation
Overview
CVE-2021-3989 is a URL Redirection to Untrusted Site vulnerability affecting showdoc software versions up to (excluding) 2.9.13. The vulnerability was discovered and disclosed in December 2021, allowing potential attackers to perform open redirect attacks (NVD).
Technical details
The vulnerability has been assigned a CVSS v3.1 base score of 6.1 (Medium) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. The issue is classified as CWE-601: URL Redirection to Untrusted Site ('Open Redirect'). The vulnerability requires user interaction and can be exploited remotely without authentication (NVD).
Impact
The vulnerability allows attackers to redirect users to untrusted sites, potentially leading to phishing attacks. It affects the confidentiality and integrity of the system with low impact, while having no impact on availability (NVD).
Mitigation and workarounds
A patch has been released that implements parameter verification for the redirect functionality. The fix includes validation of redirect parameters to prevent phishing redirects by checking for absolute addresses containing dots (GitHub Patch).
Additional resources
Source: This report was generated using AI
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