CVE-2026-40588

High

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.

SeverityHigh
CVSS8.1
Exploit probability—
ProductBlueprintue-self-hosted-edition
PublishedApr 21, 2026
First seenApr 21, 2026
Weakness typeCWE-620CWE-620

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
blueprintue blueprintue-self-hosted-edition< 4.2.0—

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