CVE-2025-3530

WordPress Simple PayPal Shopping Cart <= 5.1.2 - Unauthenticated Product Price Manipulation

2025-04-22 19:06
Jack Taylor

Strategic Overview

Status
Patched in 5.1.3
Affected Plugin
Simple Shopping Cart
Affected Version
<= 5.1.2
CVSS
7.5High
Weakness type
CWE-472 · External Control of Assumed-Immutable Web Parameter
CVE
CVE-2025-3530
View all Simple Shopping Cart vulnerabilities

At a glance

CVE-2025-3530 is a high-severity External Control of Assumed-Immutable Web Parameter vulnerability in the Simple Shopping Cart WordPress plugin, affecting versions <= 5.1.2. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high integrity impact). Exploitation requires no authentication. The issue is fixed in version 5.1.3; sites on affected versions should update now. Disclosed April 2025, reported by Jack Taylor.

Vulnerability Overview

The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to product price manipulation in all versions up to, and including, 5.1.2. This is due to a logic flaw involving the inconsistent use of parameters during the cart addition process. The plugin uses the parameter 'product_tmp_two' for computing a security hash against price tampering while using 'wspsc_product' to display the product, allowing an unauthenticated attacker to substitute details from a cheaper product and bypass payment for a more expensive item.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on integrity.

CWE-472: External Control of Assumed-Immutable Web Parameter

Simple Shopping Cart <= 5.1.2 carries this weakness at product_tmp_two, and reaching it takes no account at all. External control of an assumed-immutable parameter means the code trusts a value it believes cannot be changed by the caller, when in fact the request carries it.

Editing that field changes the outcome of the operation, which on commerce plugins means altered prices or totals and on account flows means acting as another user. For Simple Shopping Cart the fix is 5.1.3: builds <= 5.1.2 are affected, anything from 5.1.3 onward is not.

Remediation

Update to version 5.1.3, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Simple Shopping Cart 5.1.3 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-3530https://www.wordfence.com/threat-intel/vulnerabilities/id/e0a3910b-adc4-4633-a6a1-32ba50894be4https://nvd.nist.gov/vuln/detail/CVE-2025-3530

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C