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TI-2026-13308 Aliases CVE-2026-15826GHSA-2v77-3rr8-9p3p

Incorrect type conversion in Cozmoslabs User Profile Builder – Beautiful User…

Priority MEDIUM 55CWE-704Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
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-704 and the CVSS impact.

Summary

The User Profile Builder plugin for WordPress is vulnerable to Authentication Bypass via Type Confusion in versions up to, and including, 3.16.4. This is due to the wppb_log_in_user() function calling absint() on the return value of wp_insert_user() before performing an is_wp_error() check — when a registration is submitted with a 61–70 character username, WordPress core rejects it with a WP_Error object, but absint() coerces that object to the integer 1 before the error check can short-circuit execution, causing the plugin to bind and return a transient-backed autologin nonce tied to user ID 1. This makes it possible for unauthenticated attackers to log in as the site's Administrator account (user ID 1), resulting in full administrative takeover of the site.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03904 90th 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
Yes
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
CozmoslabsUser Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editorup to 3.16.4—No fix listedCNA
  • User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor VendorCozmoslabs Affected up to 3.16.4 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:cozmoslabs:profile_builder:*:*:*:*:*:*:*:*——Cozmoslabs
  • cpe:2.3:a:cozmoslabs:profile_builder:*:*:*:*:*:*:*:* Versions — — ·Cozmoslabs

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15826
  2. 2026-10-03 Alias added: GHSA-2v77-3rr8-9p3p
  3. 2026-10-08 EPSS moved to the 90th–95th percentile

References

Other 9

  • TI-2024-06204 profile-builder <= 3.11.8 - Unauthenticated Privilege Escalation CVSS 3.1CRITICAL 9.8
  • TI-2024-05908 User Profile Builder < 3.11.8 - Unauthenticated Media Upload CVSS 3.1CRITICAL 9.1
  • TI-2026-56948 Cozmoslabs Profile Builder Plugin Avatar Simple Upload AJAX admin-ajax.php wppb_ajax_simple_avatar unrestricted upload CVSS 4.0MEDIUM 6.9
  • TI-2026-15943 TranslatePress – Multilingual <= 3.3.1 - Unauthenticated Account Takeover via Password Reset Link Disclosure CVSS 3.1CRITICAL 9.8
  • TI-2024-06217 Profile Builder <= 3.12.0 - Admin+ Stored Cross Site Scripting CVSS 3.1MEDIUM 4.8
  • TI-2022-04059 WCK < 2.3.3 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
See all 99 →

Sources

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