Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation (CVE-2026-16990) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-16990

Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation

Answer in brief

CVE-2026-16990 records a Medium severity (CVSS 5.3) vulnerability in Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation. The current sources do not mark it as known exploited. The current feed maps Unknown/Payment Button for PayPal (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 12, 2026Updated Aug 26, 2026Source checked Sep 26, 2026First seen by HOL Aug 12, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/Payment Button for PayPal (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Unknown/Payment Button for PayPalgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Unknown/Payment Button for PayPal.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 12, 2026

Sources and claim methodology

Source referencewpscan.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.