CVE-2020-28339

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-11-07 · updated 2026-06-17
Weakness: CWE-502

Description

The usc-e-shop (aka Collne Welcart e-Commerce) plugin before 1.9.36 for WordPress allows Object Injection because of usces_unserialize. There is not a complete POP chain.

Affected products

Welcart e-Commerce: before 1.9.36 — fixed in 1.9.36

How to fix

Upgrade to a fixed version: Welcart e-Commerce 1.9.36. Check the vendor advisory for mitigations.

References

https://wordpress.org/plugins/usc-e-shop/#developers
https://www.wordfence.com/blog/2020/11/object-injection-vulnerability-in-welcart-e-commerce-plugin/
https://wordpress.org/plugins/usc-e-shop/#developers
https://www.wordfence.com/blog/2020/11/object-injection-vulnerability-in-welcart-e-commerce-plugin/

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