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CVE-2026-53959— 4gaBoards: Mass Information Disclosure (Internal PII Leakage) on /api/users to any authenticated user

CVSS 6.5 · Medium EPSS 0.03% · P11
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I. Basic Information for CVE-2026-53959

Vulnerability Information
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Vulnerability Title
4gaBoards: Mass Information Disclosure (Internal PII Leakage) on /api/users to any authenticated user
Source: CVE Program / CVE List V5
Vulnerability Description
4gaBoards is a boards system for realtime project management. Prior to 3.3.9, 4gaBoards allows any authenticated user to enumerate account information for every user through GET /api/users and retrieve arbitrary accounts through GET /api/users/:id. The users/index and users/show actions rely only on the default is-authenticated policy in server/config/policies.js, and server/api/controllers/users/index.js returns the result of sails.helpers.users.getMany() without requester-specific authorization or response sanitization. Responses expose email, phone, organization, name, isAdmin, ssoGoogleEmail, ssoGithubEmail, and other SSO-linked email fields, including data for administrators. This enables instance-wide user enumeration, privacy loss, and targeted phishing reconnaissance. This issue is fixed in version 3.3.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
RARgames4gaBoards < 3.3.9 -

II. Public POCs for CVE-2026-53959

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III. Intelligence Information for CVE-2026-53959

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Vendor Advisories for CVE-2026-53959 (1)

Exploits & Public PoCs for CVE-2026-53959 (1)

Same Patch Batch · RARgames · 2026-08-18 · 4 CVEs total

CVE-2026-501918.8 HIGH4gaBoards: Pre-Account Takeover via SSO Email Linkage
CVE-2026-501868.8 HIGH4gaBoards: Path Traversal leading to Arbitrary File Read and Deletion in Board Export
CVE-2026-539587.6 HIGH4gaBoards: SSO Pre-Account Takeover / Hijacking via Mass Assignment

IV. Related Vulnerabilities

Same product: 4gaBoards
Same vendor: RARgames
Same weakness: CWE-200

V. Comments for CVE-2026-53959

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