CVE-2026-50191 (GCVE-0-2026-50191)
Vulnerability from cvelistv5 – Published: 2026-08-18 21:33 – Updated: 2026-08-19 18:19
VLAI
EPSS
VEX
Title
4gaBoards: Pre-Account Takeover via SSO Email Linkage
Summary
4gaBoards is a boards system for realtime project management. Prior to 3.3.8, 4gaBoards is vulnerable to pre-account takeover when registrationEnabled, localRegistrationEnabled, and ssoRegistrationEnabled are enabled and Google, GitHub, Microsoft, or OIDC SSO is configured. The POST /api/register endpoint permits creation of an unverified local account with a victim's email address, and POST /api/access-tokens permits that account to authenticate while isVerified is false. During the victim's first SSO login, server/api/helpers/users/get-create-one-for-github-sso.js, server/api/helpers/users/get-create-one-for-google-sso.js, server/api/helpers/users/get-create-one-for-microsoft-sso.js, and server/api/helpers/users/get-create-one-for-oidc-sso.js find the attacker-controlled account by email and link the verified SSO identity without confirming ownership of the local account. The attacker can retain local-password access to the linked account and obtain the victim's projects, data, and permissions. This issue is fixed in version 3.3.8.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 18:16 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/RARgames/4gaBoards/security/ad… | x_refsource_CONFIRM |
| https://github.com/RARgames/4gaBoards/commit/484c… | x_refsource_MISC |
| https://github.com/RARgames/4gaBoards/releases/ta… | x_refsource_MISC |
Impacted products
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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