CVE-2026-15368Public exploitNetwork attack vector

Unauthenticated account takeover via misbound auto-login

Published Aug 1, 2026 · Updated Aug 1, 2026

Authentication bypass in Cozmoslabs Profile Builder before 3.16.4 allows remote attackers to obtain any existing user's session. The registration handler accepts a supplied existing email when the email field is absent, and the auto-login URL uses that account's uid instead of the new account's identifier. The site must enable non-default automatic login and remove the registration form's email field; knowing or guessing a target email then permits administrator takeover.

CVSS severity8.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Cozmoslabs Profile Builder before 3.16.4 allows remote attackers to obtain any existing user's session. The registration handler accepts a supplied existing email when the email field is absent, and the auto-login URL uses that account's uid instead of the new account's identifier. The site must enable non-default automatic login and remove the registration form's email field; knowing or guessing a target email then permits administrator takeover.

The record

CVE
CVE-2026-15368
Published
Aug 1, 2026
Updated
Aug 1, 2026
Vendor
Cozmoslabs
Product
Profile Builder
Classifications
CWE-269, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.16.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cozmoslabs · Profile Builderversion=0 <3.16.4

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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