CVE-2024-30527

WP Express Checkout (Accept PayPal Payments) <= 2.3.7 - Unauthenticated Price Manipulation

2024-03-29 00:00

Strategic Overview

Status: Patched in 2.3.8
Affected Plugin: WP Express Checkout (Fast Payments via PayPal & Stripe)
Affected Version: <= 2.3.7
CVSS: 5.3Medium
Weakness type: CWE-348 · Use of Less Trusted Source
CVE: CVE-2024-30527

View all WP Express Checkout (Fast Payments via PayPal & Stripe) vulnerabilities

At a glance

CVE-2024-30527 is a medium-severity Use of Less Trusted Source vulnerability in the WP Express Checkout (Fast Payments via PayPal & Stripe) WordPress plugin, affecting versions <= 2.3.7. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.3.8; sites on affected versions should update now. Disclosed March 2024, reported by Xinzhi Luo.

Vulnerability Overview

The WP Express Checkout (Accept PayPal Payments) plugin for WordPress is vulnerable to price manipulation in all versions up to, and including, 2.3.7. This is due to insufficient validation on the pricing data being passed to the server. This makes it possible for unauthenticated attackers to modify the price of bookings.

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.

CWE-348: Use of Less Trusted Source

The product has two different sources of the same data or information, but it uses the source that has less support for verification, is less trusted, or is less resistant to attack.

Remediation

Update to version 2.3.8, 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: WP Express Checkout (Fast Payments via PayPal & Stripe) 2.3.8 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-2024-30527 https://www.wordfence.com/threat-intel/vulnerabilities/id/42cd1b53-400f-4933-b3cc-2fd9079e241c https://nvd.nist.gov/vuln/detail/CVE-2024-30527

Related records

Other vulnerabilities in WP Express Checkout (Fast Payments via PayPal & Stripe)

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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