CVE-2026-16990 | BDVDB-2026-358229 Detail

Payment Button for PayPal

Description#

The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-602 Client-Side Enforcement of Server-Side Security

References#

https://wpscan.com/vulnerability/97c08603-c407-43b2-ab2c-e39f85e89ebe/

Exploit#

https://wpscan.com/vulnerability/97c08603-c407-43b2-ab2c-e39f85e89ebe/

History#

Version 12026-08-12Record published in the CVE List.

Published

Published: 2026-08-12
Last modified: 2026-08-12

Vendor information

Vendor: Not stated
Product: Payment Button for PayPal

Score

5.3 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 25.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
<= 1.2.3.44
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.3 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).