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TI-2026-86534 Aliases CVE-2026-96565GHSA-g5gq-75fv-5gwh

Stored cross-site scripting in WP-Members via WooCommerce checkout

Priority LOW 26CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The WP-Members Membership Plugin is affected up to and including version 3.5.7. Insufficient sanitization and output escaping of WooCommerce checkout multicheckbox and multiselect fields lets scalar input bypass array sanitization (CWE-79). An authenticated attacker with subscriber-level access or higher can store scripts that execute whenever a user accesses an injected page. Only the WooCommerce classic checkout path is exploitable.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

The WP-Members Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via WooCommerce Checkout Multicheckbox/Multiselect Field (scalar bypass of wpmem_sanitize_array) in all versions up to, and including, 3.5.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is only exploitable via the WooCommerce classic checkout path, as the sibling registration, profile, and account-edit handlers implode the value before sanitization, which raises a PHP 8 TypeError on scalar input and fails closed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cbutlerjrWP-Members Membership Pluginup to 3.5.7—No fix listedCNA
  • WP-Members Membership Plugin Vendorcbutlerjr Affected up to 3.5.7 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:butlerblog:wp-members:*:*:*:*:*:*:*:*——cbutlerjr
  • cpe:2.3:a:butlerblog:wp-members:*:*:*:*:*:*:*:* Versions — — ·cbutlerjr

Remediation

The sources list no fixed version for WP-Members Membership Plugin.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Timeline

  1. 2026-11-07 Threatist record created from CVE-2026-96565
  2. 2026-11-07 Alias added: GHSA-g5gq-75fv-5gwh
  3. 2026-11-07 CISA SSVC decision points changed
  4. 2026-11-07 Priority changed: MEDIUM → LOW

References

Other 8

  • TI-2024-01724 WP-Members Membership Plugin <= 3.4.9.2 - Unauthenticated Stored Cross-Site Scripting CVSS 3.1HIGH 7.2
  • TI-2019-11755 The wp-members plugin before 3.2.8 for WordPress has CSRF. CVSS 3.0HIGH 8.8
  • TI-2024-02728 WP-Members Membership Plugin <= 3.4.9.3 - Unprotected Storage of Potentially Sensitive Files CVSS 3.1MEDIUM 5.3
  • TI-2017-01512 Cross-site scripting in Chad Butler WP-Members CVSS 3.0MEDIUM 6.1
  • TI-2025-11600 WP-Members Membership Plugin <= 3.5.4.4 - Unauthenticated Information Exposure via Unprotected Files CVSS 3.1MEDIUM 5.3
  • TI-2026-01999 WP-Members Membership Plugin <= 3.5.5.1 - Authenticated (Contributor+) SQL Injection via 'order_by' Shortcode Attribute CVSS 3.1MEDIUM 6.5
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences