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FundEngine EUVDEUVD-2026-49227

| CVE-2026-59560 MEDIUM
Missing Authorization (CWE-862)
2026-07-27 Patchstack GHSA-7rhf-gp2p-72j6
6.5
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
    Register or obtain Subscriber account
  2. Exploit
    Send request to unprotected plugin action
  3. Execution
    Missing authorization check bypassed
  4. Impact
    Disrupt fundraising availability

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

Requires an authenticated WordPress session at Subscriber level (PR:L) on a site running FundEngine (plugin slug wp-fundraising-donation) version <= 1.7.8; the attacker must reach a plugin action/endpoint that omits its capability or nonce authorization check (CWE-862 missing authorization). Limiting factors: the site must allow the attacker to hold a low-privilege account - practical only where open user registration is enabled or the attacker already has a Subscriber login; impact is confined to availability of the plugin's fundraising functionality (no data disclosure or modification), and no unauthenticated path is indicated.

Impact

Multiple signals converge on this being a genuine-but-moderate issue rather than an urgent priority. The CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, base 6.5) describes a network-reachable, low-complexity flaw requiring only low-privilege (PR:L) authenticated access - consistent with the 'Subscriber' broken-access-control framing, since a Subscriber is the lowest self-registerable WordPress role. Impact is availability-only (A:H) with no confidentiality or integrity effect, which caps the ceiling at denial/disruption rather than data theft or takeover. Corroborating this, SSVC reads Exploitation: none, Automatable: no, Technical Impact: partial, and EPSS is low at 0.35% (28th percentile). There is no CISA KEV listing and no public exploit code referenced. The signals are internally consistent - no conflict between the CVSS network vector and the description, though note that PR:L means an attacker must first hold (or self-register) a Subscriber account, which many WordPress sites permit but many disable. Net: a real, patch-worthy authorization defect but not a widespread-exploitation emergency; prioritize based on whether the site allows open registration and how critical availability of the fundraising feature is.

Exploit ScenarioDerived

An attacker registers or obtains a low-privilege Subscriber account on a WordPress site running FundEngine <= 1.7.8, then invokes a plugin action that lacks a proper capability/authorization check. Because the endpoint only requires an authenticated session (PR:L) and no user interaction, the attacker triggers state changes that disrupt availability of the fundraising/donation functionality (A:H). No public proof-of-concept exploit is referenced at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 16, 2026

Authenticated users holding only a Subscriber-level WordPress account can disrupt the fundraising functionality of sites running the FundEngine plugin (slug wp-fundraising-donation) through version 1.7.8, because a plugin action omits its capability and nonce authorization checks (CWE-862 missing authorization). The effect is limited to availability - there is no data disclosure or modification - and access requires an existing low-privilege login, which is realistic mainly where open user registration is enabled or the attacker already has an account. No public exploit code has been identified and there is no indication of active exploitation; EPSS is a low 0.35% (28th percentile) and CISA's SSVC framework rates exploitation as none, automatable as no, and technical impact as partial.

RemediationAI

The primary fix is to update the FundEngine plugin (wp-fundraising-donation) past the vulnerable range - the advisory identifies every release up to and including 1.7.8 as affected, so upgrade to the latest available release above 1.7.8; the provided data does not list a confirmed patched version number, so verify the exact fixed release in the Patchstack advisory before deploying. If an immediate upgrade is not possible, the highest-value compensating control is to deactivate the plugin entirely, accepting the loss of fundraising/donation functionality rather than exposing the unguarded action. Because exploitation requires a Subscriber-level login, reduce the attack surface by disabling open user registration (Settings > General > 'Anyone can register') and auditing existing accounts for unnecessary low-privilege users, though this will not help sites that intentionally allow public sign-ups or already host the attacker's account. Additional hardening options include reviewing the plugin's AJAX/REST routes and blocking the specific admin-ajax.php action at the WAF or reverse proxy, and rate-limiting or monitoring those endpoints; both carry trade-offs, since a WAF rule on admin-ajax.php actions is easy to bypass if the action name is not pinned down exactly and may break legitimate donation flows if over-broad. Note that no vendor patch version, workaround, or CISA KEV entry was provided in the available intelligence, so remediation should be validated against the advisory link above.

Affected VersionsENISA

FundEngine n/a ≤1.7.8

Affected Packages

euvd fundengine 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

FundEngine is a WordPress fundraising/donation plugin distributed as wp-fundraising-donation by the vendor Roxnor, matching the CPE cpe:2.3:a:roxnor:fundengine:*:*:*:*:*:*:*:* and tracked by ENISA as EUVD-2026-49227. The root cause class is CWE-862 (Missing Authorization): the plugin exposes an action or endpoint that performs a state-changing or resource-consuming operation without validating the caller's capability (for example a current_user_can() check) or a nonce (check_ajax_referer()/wp_verify_nonce()), which is a common failure mode in WordPress AJAX handlers registered via wp_ajax_* hooks. The CVSS 3.1 vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H shows a remotely reachable, low-complexity path that nonetheless requires a low-privileged authenticated session and yields high availability impact only, with confidentiality and integrity scored as none; no scope change means the flaw stays within the plugin's own security authority. Patchstack's taxonomy labels the issue both 'Broken Access Control' and 'Authentication Bypass', but the assessed vector places the prerequisite at Subscriber level (PR:L) rather than unauthenticated, so this should be treated as a privilege-boundary/authorization gap rather than a true pre-auth bypass.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Patchstack) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI 6.5 MEDIUM

Network-reachable but needs a low-privilege Subscriber account (PR:L); missing authorization is trivially triggered (AC:L); impact is availability-only (A:H) with no C/I effect.

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

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

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

DescriptionCVE.org

Subscriber Broken Access Control in FundEngine <= 1.7.8 versions.

Threat Intelligence Overview

EPSS Score
0.4%
Top 72% exploitable
Prevalence
Low
niche WordPress fundraising/donation plugin (wp-fundraising-donation) by small vendor Roxnor
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 0.4%
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
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
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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