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Vulnerability record · CVE-2019-14979 · published 29 August 2019

CVE-2019-14979: Woocommerce paypal checkout payment gateway improper input validation vulnerability

Woocommerce · Paypal Checkout Payment Gateway

cgi-bin/webscr?cmd=_cart in the WooCommerce PayPal Checkout Payment Gateway plugin 1.6.17 for WordPress allows Parameter Tampering in an amount parameter (such as amount_1), as demonstrated by purchasing an item for lower than the intended price. NOTE: The plugin author states it is true that the amount can be manipulated in the PayPal payment flow. However, the amount is validated against the WooCommerce order total before completing the order, and if it doesn’t match then the order will be left in an “On Hold” state

5.3 CVSS 3.0 Medium EPSS 1.1% · top 36.0% CWE-20 · Improper input validation
5.3CVSS 3.0 base score, v2 5.0
1.1%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

cgi-bin/webscr?cmd=_cart in the WooCommerce PayPal Checkout Payment Gateway plugin 1.6.17 for WordPress allows Parameter Tampering in an amount parameter (such as amount_1), as demonstrated by purchasing an item for lower than the intended price. NOTE: The plugin author states it is true that the amount can be manipulated in the PayPal payment flow. However, the amount is validated against the WooCommerce order total before completing the order, and if it doesn’t match then the order will be left in an “On Hold” state

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

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

References

LinkTags
https://gkaim.com/cve-2019-14979-vikas-chaudhary/ ExploitThird Party Advisory
https://wordpress.org/support/topic/vulnerabilty-in-plugin/#post-11899173
https://gkaim.com/cve-2019-14979-vikas-chaudhary/ ExploitThird Party Advisory
https://wordpress.org/support/topic/vulnerabilty-in-plugin/#post-11899173

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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-2019-14979), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.