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CVE-2026-40588— blueprintUE: Authenticated Password Change Does Not Verify Current Password

Quick assessment

Affected
blueprintue blueprintue-self-hosted-edition
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

blueprintUE self-hosted edition是blueprintUE开源的一个自托管的数据建模与可视化工具。 blueprintUE self-hosted edition 4.2.0之前版本存在安全漏洞，该漏洞源于/profile/{slug}/edit/处的密码更改表单不包含current_password字段，且在接受新密码之前不验证用户的现有密码，可能导致获得有效认证会话的攻击者无需知道原始凭据即可立即更改帐户密码，导致永久帐户接管。

CVSS 8.1 · High EPSS 0.37% · P29
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I. Basic Information for CVE-2026-40588

Vulnerability Information
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Vulnerability Title
blueprintUE: Authenticated Password Change Does Not Verify Current Password
Source: CVE Program / CVE List V5
Vulnerability Description
blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, the password change form at /profile/{slug}/edit/ does not include a current_password field and does not verify the user's existing password before accepting a new one. Any attacker who obtains a valid authenticated session — through XSS exploitation, session sidejacking over HTTP, physical access to a logged-in browser, or a stolen "remember me" cookie — can immediately change the account password without knowing the original credential, resulting in permanent account takeover. This vulnerability is fixed in 4.2.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
未经验证的口令修改
Source: CVE Program / CVE List V5
Vulnerability Title
blueprintUE self-hosted edition 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
blueprintUE self-hosted edition是blueprintUE开源的一个自托管的数据建模与可视化工具。 blueprintUE self-hosted edition 4.2.0之前版本存在安全漏洞，该漏洞源于/profile/{slug}/edit/处的密码更改表单不包含current_password字段，且在接受新密码之前不验证用户的现有密码，可能导致获得有效认证会话的攻击者无需知道原始凭据即可立即更改帐户密码，导致永久帐户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
blueprintue blueprintue-self-hosted-edition < 4.2.0 -

II. Public POCs for CVE-2026-40588

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III. Intelligence Information for CVE-2026-40588

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Vendor Advisories for CVE-2026-40588 (1)

Same Patch Batch · blueprintue · 2026-04-21 · 4 CVEs total

CVE-2026-40586 7.5 HIGH blueprintUE: Login Endpoint Has No Rate Limiting, Lockout, or Brute-Force Protection
CVE-2026-40585 7.4 HIGH blueprintUE: Password Reset Tokens Have No Expiry Window
CVE-2026-40587 6.5 MEDIUM blueprintUE: Active Sessions Are Not Invalidated After Password Change or Reset

IV. Related Vulnerabilities

Same product: blueprintue-self-hosted-edition
Same vendor: blueprintue
Same weakness: CWE-620

V. Comments for CVE-2026-40588

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