ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-15826

cozmoslabs profile_builder Incorrect Type Conversion or Cast

Published Aug 15, 2026 · catalog updated Aug 15, 2026 · cozmoslabs profile_builder Incorrect Type

Patch now

CVE-2026-15826 is in the CISA known-exploited catalog. Confirm cozmoslabs profile_builder Incorrect Type against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (cozmoslabs profile_builder Incorrect Type).
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
3.90%
Remediation
Remediation guidance
Affected products
stated profile_builder · vendor cozmoslabs profile_builder

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated profile_builder<= 3.16.4
  • vendor cozmoslabs profile_builderversion unspecified

How to fix CVE-2026-15826

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-15826 is in the CISA known-exploited catalog. Confirm cozmoslabs profile_builder Incorrect Type against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with <= 3.16.4. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 3.90%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 15, 2026 · VulnCheck KEV

    Detected

    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

  2. Aug 15, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-15826

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-15826

    30-day exploitation probability 3.9%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-15826

    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_err

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.