CVE-2026-40588Public exploitNetwork attack vector

Account takeover via unverified password change

Published Apr 21, 2026 · Updated Apr 21, 2026

Unverified password change in blueprintUE Self-Hosted Edition before 4.2.0 allows remote authenticated users to take over accounts. ProfileEditController.php's treatFormChangePassword() omits the current password, and doProcessChangePassword() passes the replacement directly to UserService::updatePassword without checking the existing hash. A valid victim session and its bound CSRF token are required; the attacker can replace the password and lock out the account owner.

CVSS severity8.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unverified password change in blueprintUE Self-Hosted Edition before 4.2.0 allows remote authenticated users to take over accounts. ProfileEditController.php's treatFormChangePassword() omits the current password, and doProcessChangePassword() passes the replacement directly to UserService::updatePassword without checking the existing hash. A valid victim session and its bound CSRF token are required; the attacker can replace the password and lock out the account owner.

The record

CVE
CVE-2026-40588
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
blueprintUE
Product
blueprintUE Self-Hosted Edition
Classifications
CWE-620, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 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=< 4.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

blueprintUE · blueprintUE Self-Hosted Editionversion=< 4.2.0

Published CVSS scores

7.3GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C
8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-620Unverified Password Change
T1098Account Manipulation

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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