CVE-2020-4074: Improper Authentication

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-02 · updated 2026-06-17
Weakness: CWE-287

Description

In PrestaShop from version 1.5.0.0 and before version 1.7.6.6, the authentication system is malformed and an attacker is able to forge requests and execute admin commands. The problem is fixed in 1.7.6.6.

Affected products

PrestaShop: from 1.5.0.0 before 1.7.6.6 — fixed in 1.7.6.6

How to fix

Upgrade to a fixed version: PrestaShop 1.7.6.6. Check the vendor advisory for mitigations.

References

https://github.com/PrestaShop/PrestaShop/commit/30b6a7bdaca9cb940d3ce462906dbb062499fc30
https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-ccvh-jh5x-mpg4
https://github.com/PrestaShop/PrestaShop/commit/30b6a7bdaca9cb940d3ce462906dbb062499fc30
https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-ccvh-jh5x-mpg4

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