What is the CVSS score of EUVD-2026-36953?

EUVD-2026-36953 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.2%.

Which versions of Paid Member Subscriptions are affected by EUVD-2026-36953?

The Paid Member Subscriptions WordPress plugin (versions through 2.17.3) contains a reflected cross-site scripting vulnerability (CVSS 7.1) that allows unauthenticated attackers to execute malicious…

How to fix or mitigate EUVD-2026-36953?

Within 24 hours: Disable the Paid Member Subscriptions plugin and notify all WordPress site administrators; monitor web server and WAF logs for exploitation attempts. Within 7 days: Evaluate alternative membership plugins or temporary workarounds; subscribe to Patchstack security alerts for vendor updates. Within 30 days: Execute remediation plan immediately upon patch release from Cozmoslabs; test patch in staging environment before production deployment.

Paid Member Subscriptions EUVD-2026-36953

| CVE-2026-39514 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-06-15 Patchstack

GHSA-pph5-c47c-2wv3

XSS Paid Member Subscriptions

7.1

CVSS 3.1 · Vendor: Patchstack

Severity by source

Vendor (Patchstack) PRIMARY

7.1 HIGH

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

vuln.today AI

7.1 HIGH

Reflected XSS reachable over the network without authentication but requiring a victim click (UI:R); script executes in browser context crossing scope (S:C) with limited C/I/A.

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

4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Jun 15, 2026 - 22:21 vuln.today

DescriptionCVE.org

Unauthenticated Cross Site Scripting (XSS) in Paid Member Subscriptions <= 2.17.3 versions.

AnalysisAI

Reflected cross-site scripting in the Paid Member Subscriptions WordPress plugin (versions through 2.17.3) allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser when the victim clicks a crafted link. No public exploit identified at time of analysis, but the vulnerability is reachable without authentication and carries a CVSS 3.1 score of 7.1 driven by scope change. The flaw was disclosed by Patchstack and affects the Cozmoslabs-maintained membership/subscription plugin used on WordPress sites.

Technical ContextAI

Paid Member Subscriptions is a WordPress plugin by Cozmoslabs (CPE cpe:2.3:a:cozmoslabs:paid_member_subscriptions) that handles paid memberships, subscriptions, and restricted content on WordPress sites. The root cause is CWE-79 (Improper Neutralization of Input During Web Page Generation), meaning user-controlled input is reflected back into an HTML response without proper output encoding or contextual escaping. In this class of bug, a request parameter is echoed into the page so that injected <script> or attribute-breaking payloads execute in the victim's browser under the site's origin. The CVSS scope-change flag (S:C) indicates the injected script can act beyond the vulnerable component - typical for stored/reflected XSS in WordPress because malicious script in the public site context can pivot to authenticated admin sessions and the WordPress admin component.

RemediationAI

Upgrade the Paid Member Subscriptions plugin to a version newer than 2.17.3 as soon as a fixed release is published by Cozmoslabs; no specific fixed version is enumerated in the provided data, so consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/paid-member-subscriptions/vulnerability/wordpress-paid-member-subscriptions-plugin-2-17-3-reflected-cross-site-scripting-xss-vulnerability) and the plugin's WordPress.org changelog for the patched release. Until upgraded, compensating controls include deploying a WAF rule (e.g., Patchstack, Wordfence) to filter reflected XSS payloads against plugin endpoints, enforcing a strict Content-Security-Policy that forbids inline scripts on pages served by the plugin (trade-off: may break legitimate inline handlers in themes), and instructing administrators not to click membership-related links from untrusted sources. Disabling or uninstalling the plugin entirely is the most reliable workaround but will break paid membership and subscription functionality on the site.