Description
The Premium Packages – Sell Digital Products Securely plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 7.0.4 via the `wpdmppdl` parameter. This is due to the `download()` function — hooked to the unauthenticated WordPress `wp` action — decoding the attacker-controlled `wpdmppdl` parameter using only `base64_decode()` and `json_decode()` with no HMAC, cryptographic signature, or nonce verification, and then issuing WordPress authentication cookies after a domain check that is trivially bypassed because both sides of the comparison are attacker-supplied values. This makes it possible for unauthenticated attackers to authenticate as any non-administrator WordPress user, including subscribers, customers, contributors, authors, editors, and shop managers, who owns an order, gaining full session-level access to that account.
References
https://www.wordfence.com/threat-intel/vulnerabilities/id/0183866d-1eab-4982-b62e-77751c7e738c?source=cve
https://plugins.trac.wordpress.org/changeset?reponame=&old=3611573%40wpdm-premium-packages&new=3611573%40wpdm-premium-packages
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L637
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L632
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L585
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/wpdm-premium-packages.php#L119
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.3/includes/libs/functions.php#L1811
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L637
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L632
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L585
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/wpdm-premium-packages.php#L119
https://plugins.trac.wordpress.org/browser/wpdm-premium-packages/tags/7.0.0/includes/libs/functions.php#L1811
