CVE-2026-40588— blueprintUE: Authenticated Password Change Does Not Verify Current Password
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经验证的口令修改
Source: NVD (National Vulnerability Database)
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
| # | POC Description | Source Link | Shenlong Link |
|---|
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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 weakness: CWE-620
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SODOLA SL902-SWTGW124AS <= 200.1.20 Unverified Password Chan - CVE-2026-24443
EventSentry < 6.0.1.20 Web Reports Unverified Password Chang - CVE-2026-2543
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V. Comments for CVE-2026-40588
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