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Quick Paypal Payments CVE-2026-108492

| EUVDEUVD-2026-98349 MEDIUM
Missing Authorization (CWE-862)
2026-10-13 Patchstack GHSA-xxg6-q3fq-9xq2
5.3
CVSS 3.1 · Vendor: Patchstack
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify site running vulnerable plugin
  2. Exploit
    Send unauthenticated request to unprotected endpoint
  3. Execution
    Invoke missing-authorization function
  4. Impact
    Modify plugin/payment data (integrity impact)

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires only network reachability to a WordPress site running Quick Paypal Payments version n/a through 6.0.3; per CVSS AV:N/AC:L/PR:N/UI:N it is remote, unauthenticated, and needs no user interaction against default configurations. The practical limiting factors are scope and impact rather than access: the flaw yields only Low integrity impact (C:N/A:N), so an attacker can reach and invoke an access-controlled plugin function and alter bounded plugin/payment-related data, but cannot read confidential data or disrupt availability through this issue alone. Risk is further bounded by the plugin's modest deployment footprint and the requirement that the vulnerable endpoint be present (i.e., the plugin installed and active).

Impact

This is a moderate-risk, not high-priority, issue. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes a remotely reachable, low-complexity, unauthenticated flaw, but the impact is deliberately narrow: integrity is Low (I:L) with no confidentiality (C:N) or availability (A:N) effect, yielding a base score of 5.3 (Medium). As a CWE-862 Missing Authorization bug, it lets an unauthenticated actor reach a function that should be access-controlled, but the single Low integrity impact implies limited, bounded state changes rather than full compromise. No EPSS score, no CISA KEV listing, and no public exploit code were provided in the input, so there is no public exploit identified at time of analysis and no evidence of active or automatable exploitation. The combination of 'easy to reach' but 'low impact' is typical of Patchstack-reported WordPress plugin authorization gaps: worth patching, but not an emergency relative to RCE or auth-bypass-to-admin issues. Missing signals (EPSS, POC, KEV) mean exploitation likelihood is inferred only from the low barrier to reach the endpoint, not from observed activity.

Exploit ScenarioDerived

An unauthenticated attacker identifies a WordPress site running Quick Paypal Payments <= 6.0.3 and sends a crafted HTTP request directly to a plugin endpoint (e.g. an AJAX or REST action) that fails to verify the caller's authorization. Because no authentication, user interaction, or special complexity is required (AV:N/AC:L/PR:N/UI:N), the attacker triggers a restricted action to alter plugin-managed data or settings. No public exploit code was identified at time of analysis, but the low complexity makes manual exploitation straightforward.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 13, 2026

An unauthenticated remote attacker can invoke access-controlled functionality in the Fullworks Plugins Quick Paypal Payments WordPress plugin (versions through 6.0.3) because the plugin does not enforce the authorization checks that gate those code paths. Successful exploitation yields a bounded Low integrity impact - an attacker can reach and manipulate plugin/payment-related data but cannot read confidential data or affect availability through this issue alone, which is why this is a moderate-risk, not high-priority, issue per our assessment. No public exploit code was identified at time of analysis and the plugin has no CISA KEV listing, but the endpoint is trivially reachable over the network with no credentials or user interaction required, and no vendor-released fixed version is confirmed in the available data.

RemediationAI

No vendor-released patch is identified in the available input data at time of analysis, so the fixed version - if one exists - must be confirmed directly against the Fullworks Plugins Quick Paypal Payments release notes and the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/quick-paypal-payments/vulnerability/wordpress-quick-paypal-payments-plugin-6-0-3-broken-access-control-vulnerability?_s_id=cve) before upgrading; if an update addressing CVE-2026-108492 is available, apply it to every instance and stage it first, since payment plugins are sensitive to checkout regressions. Until a patch is confirmed, the most effective compensating control is to deactivate and remove the plugin if it is not actively used, which eliminates the vulnerable endpoint entirely but obviously removes its payment functionality; if it must stay live, place request-level restrictions in front of the plugin's AJAX/REST and admin-post handlers (for example WAF or reverse-proxy rules that reject unauthenticated requests to the plugin's action endpoints, or edge rules that deny direct external POSTs to admin-ajax.php carrying the plugin's action parameter), accepting that legitimate front-end checkout flows may be affected and that rules must be tuned rather than blanket-blocking. Restricting administrative access to wp-admin, enforcing least-privilege WordPress roles, and monitoring plugin/payment configuration changes for unauthorized modifications provide additional detection value but do not close the missing authorization check itself, and none of these controls are a substitute for the vendor fix.

Affected VersionsENISA

Quick Paypal Payments 0 ≤6.0.3

Affected Packages

euvd quick_paypal_payments no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The target is a commercial WordPress plugin that adds PayPal payment functionality to WordPress sites. The root cause class is CWE-862 (Missing Authorization): a function or endpoint that should be gated by a capability check (and typically a WordPress nonce) is reachable without one, so any network client can trigger the underlying action. The CPE cpe:2.3:a:fullworks_plugins:quick_paypal_payments:*:*:*:*:*:*:*:* identifies the affected WordPress component as Quick Paypal Payments published by Fullworks Plugins, with the affected range running through release 6.0.3. Because the CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N, the flaw is remotely reachable, requires no authentication and no victim interaction, and is scoped only to the plugin: the integrity loss is limited (Low) while confidentiality and availability are unaffected, consistent with an access-control gap that lets an attacker submit or alter payment/configuration data rather than exfiltrate secrets or crash the site. The underlying technology is therefore standard WordPress plugin AJAX/REST/admin-post handling in a payment context, where a missing capability or nonce check exposes a state-changing operation.

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Severity by source

Vendor (Patchstack) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
vuln.today AI 5.3 MEDIUM

Missing-authorization endpoint is remotely reachable without credentials or interaction (AV:N/AC:L/PR:N/UI:N); impact limited to partial integrity change (I:L), no confidentiality or availability effect.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

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

DescriptionCVE.org

Missing Authorization vulnerability in Fullworks Plugins Quick Paypal Payments quick-paypal-payments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Quick Paypal Payments: from n/a through 6.0.3.

Threat Intelligence Overview

EPSS Score
0.2%
Top 93% exploitable
Prevalence
Low
niche WordPress payment plugin, modest install base
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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