In PrestaShop between versions 1.7.0.0 and 1.7.6.5, there are improper access controls on product page with combinations, attachments and specific prices. The problem is fixed in 1.7.6.5.
https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-cvjj-grfv-f56w
https://github.com/PrestaShop/PrestaShop/commit/f9f442c87755908e23a6bcba8c443cdea1d78a7f
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5293