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Vulnerability record · CVE-2020-28339 · published 7 November 2020

CVE-2020-28339: Welcart e-commerce deserialization of untrusted data vulnerability

Welcart · Welcart E Commerce

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.

8.8 CVSS 3.1 High EPSS 1.9% · top 21.1% CWE-502 · Deserialization of untrusted data
8.8CVSS 3.1 base score, v2 6.5
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-28339), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.