TI-2025-03436 Aliases CVE-2025-3889 GHSA-cp88-7fch-35v3

WordPress Simple PayPal Shopping Cart <= 5.1.3 - Insecure Direct Object Reference via 'quantity'

LOW 30CWE-639Published 2025-05-01 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00366 30th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
mra13	Simple Shopping Cart	up to 5.1.3	—	No fix listed	CNA

Simple Shopping Cart Vendormra13 Affected up to 5.1.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:tipsandtricks-hq:wordpress_simple_paypal_shopping_cart::::::wordpress::*	before 5.1.4	Vulnerable	mra13

cpe:2.3:a:tipsandtricks-hq:wordpress_simple_paypal_shopping_cart:*:*:*:*:*:wordpress:*:* Versions before 5.1.4 Vulnerable ·mra13

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-3889
2026-10-03 Alias added: GHSA-cp88-7fch-35v3

References

Patch 1

https://plugins.trac.wordpress.org/changeset/3284572/

Advisory 1

https://www.wordfence.com/threat-intel/vulnerabilities/id/41212533-535e-4a9e-a9b8-1240021a3752?source=cve

Other 3

TI-2022-04270 WordPress Simple Shopping Cart < 4.6.2 - Contributor+ Stored XSS via Shortcode CVSS 3.1MEDIUM 5.4
TI-2025-03422 WordPress Simple PayPal Shopping Cart <= 5.1.3 - Insecure Direct Object Reference CVSS 3.1MEDIUM 6.5
TI-2013-02366 Cross-site request forgery (CSRF) vulnerability in the WordPress Simple Paypal Shopping… CVSS 2.0MEDIUM 6.8
TI-2023-01352 The WP Simple Shopping Cart plugin for WordPress is vulnerable to Sensitive Information… CVSS 3.1MEDIUM 5.3
TI-2025-03437 WordPress Simple PayPal Shopping Cart <= 5.1.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVSS 3.1MEDIUM 6.4
TI-2023-05954 WordPress Simple Shopping Cart <= 4.7.1 - Authenticated(Administrator+) Stored Cross-Site Scripting CVSS 3.1MEDIUM 4.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences