Python Flask-Security - Open Redirect
ID: CVE-2021-32618
Severity: medium
Author: 0x_Akoko
Tags: cve2021,cve,redirect,flask,flask-security_project
Description
Section titled “Description”Python Flask-Security contains an open redirect vulnerability. Existing code validates that the URL specified in the next parameter is either relative or has the same network location as the requesting URL. Certain browsers accept and fill in the blanks of possibly incomplete or malformed URLs. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
YAML Source
Section titled “YAML Source”id: CVE-2021-32618
info: name: Python Flask-Security - Open Redirect author: 0x_Akoko severity: medium description: Python Flask-Security contains an open redirect vulnerability. Existing code validates that the URL specified in the next parameter is either relative or has the same network location as the requesting URL. Certain browsers accept and fill in the blanks of possibly incomplete or malformed URLs. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations. impact: | An attacker can craft a malicious URL that redirects users to a malicious website, leading to potential phishing attacks or the exploitation of other vulnerabilities. remediation: | Upgrade to the latest version of Python Flask-Security library to fix the open redirect vulnerability. reference: - https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-6qmf-fj6m-686c - https://github.com/Flask-Middleware/flask-security/issues/486 - https://nvd.nist.gov/vuln/detail/CVE-2021-32618 - https://github.com/ARPSyndicate/cvemon - https://github.com/ARPSyndicate/kenzer-templates classification: cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N cvss-score: 6.1 cve-id: CVE-2021-32618 cwe-id: CWE-601 epss-score: 0.00113 epss-percentile: 0.44665 cpe: cpe:2.3:a:flask-security_project:flask-security:*:*:*:*:*:*:*:* metadata: max-request: 1 vendor: flask-security_project product: flask-security tags: cve2021,cve,redirect,flask,flask-security_project
http: - method: GET path: - '{{BaseURL}}/login?next=\\\interact.sh'
matchers: - type: regex part: header regex: - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*)interact\.sh\/?(\/|[^.].*)?$' # https://regex101.com/r/L403F0/1# digest: 4a0a00473045022100e7ed447e0192215ce3fd7db5e8d305a08ab9be5005f0d3bccdedab9a56ec2f9e022026da10350f9fb44a36f82f9f3a4853bff64b836967bbdac5a503faec399126e7:922c64590222798bb761d5b6d8e72950Guide to check the vulnerabilities
Section titled “Guide to check the vulnerabilities”This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-32618.yaml"