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TI-2026-12998 Aliases CVE-2026-15451GHSA-43m3-49cj-3hqf

Improper privilege management in MemberPress Corporate Accounts

Priority MEDIUM 40CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

The MemberPress Corporate Accounts plugin for WordPress is vulnerable to Privilege Escalation in versions up to, and including, 1.5.39. This is due to a mass assignment vulnerability in the 'add_sub_account_user' function that passes the raw 'userdata' array to 'wp_insert_user' without filtering dangerous keys like role or ID. This makes it possible for authenticated attackers, with subscriber-level access and above who hold a corporate account, to create new administrator accounts or hijack existing administrator accounts by overwriting their email addresses. The vulnerability was partially patched in version 1.5.39.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00442 38th percentileScored 2026-11-07
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
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MemberPressMemberPress Corporate Accountsup to 1.5.39—No fix listedCNA
  • MemberPress Corporate Accounts VendorMemberPress Affected up to 1.5.39 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15451
  2. 2026-10-03 Alias added: GHSA-43m3-49cj-3hqf

References

Other 2

  • TI-2026-81763 MemberPress Cross-Site Request Forgery via user_email Parameter CVSS 3.1HIGH 8.8
  • TI-2024-10466 Memberpress <= 1.11.37 - Unauthenticated Content Restriction Bypass to Sensitive Information Exposure CVSS 3.1HIGH 7.5
  • TI-2024-04672 MemberPress <= 1.11.29 - Authenticated (Contributor+) Blind Server-Side Request Forgery via mepr-user-file Shortcode CVSS 3.1HIGH 8.5
  • TI-2024-04667 MemberPress <= 1.11.29 - Authenticated (Contributor+) Stored Cross-Site Scripting via arglist Parameter CVSS 3.1MEDIUM 6.4
  • TI-2024-01319 Memberpress <= 1.11.24 - Reflected Cross-Site Scripting via message and error CVSS 3.1MEDIUM 6.1
  • TI-2024-04666 MemberPress <= 1.11.29 - Reflected Cross-Site Scripting via mepr_screenname and mepr_key Parameters CVSS 3.1MEDIUM 6.1

Sources

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