What is the CVSS score of CVE-2026-59539?

CVE-2026-59539 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.3%.

Paid Member Subscriptions CVE-2026-59539

EUVD-2026-49215 HIGH

Authorization Bypass Through User-Controlled Key (CWE-639)

2026-07-27 Patchstack

GHSA-vfqc-mpfj-gp23

WordPress Authentication Bypass Wordpress Plugin Paid Member Subscriptions Cozmoslabs

7.5

CVSS 3.1 · Vendor: Patchstack

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Vulnerability Assessment

Weakness

CWE

CWE-639

OWASP Top 10:2025

A01:2025 - Broken Access Control

ASVS 5.0

V8 - Authorization Object-level authorization, IDOR prevention

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Unauthenticated modification of subscriber data in the Paid Member Subscriptions plugin for WordPress up to version 3.0.7 allows attackers to alter other users' membership or profile information by exploiting insecure direct object references. No authentication is required, and the attack can be performed remotely without user interaction, resulting in a high integrity impact. At the time of analysis, no public exploit or active exploitation has been identified.

Affected VersionsENISA

Paid Member Subscriptions n/a ≤3.0.7

Affected Packages

euvd paid_member_subscriptions no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Patchstack) PRIMARY 7.5 HIGH

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

Primary rating from Vendor (Patchstack) · only source for this CVE.

CVSS VectorVendor: Patchstack

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

DescriptionCVE.org

Subscriber Insecure Direct Object References (IDOR) in Paid Member Subscriptions <= 3.0.7 versions.

Threat Intelligence Overview

EPSS Score

0.3%

Top 75% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

Vulnrichment

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 HIGH

CISA KEV No

Public POC No

EPSS 0.3%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

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.