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The copy function in application/admin/controller/Article.php in NoneCms 1.3.0 allows remote attackers to access the content of internal and external network resources via Server Side Request Forgery (SSRF), because URL validation only considers whether the URL contains the "csdn" substring.
Use CWE-918, 5none vendor hub and Nonecms product page to widen CVE-2018-6029 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2018-20062, CVE-2018-7219 and CVE-2020-18647 for nearby disclosures in the same product family.