{"id":"CVE-2026-53958","state":"PUBLISHED","title":"4gaBoards: SSO Pre-Account Takeover / Hijacking via Mass Assignment","description":"4gaBoards is a boards system for realtime project management. Prior to 3.3.9, 4gaBoards allows an authenticated user to modify ssoGoogleId, ssoGoogleEmail, ssoGithubId, ssoGithubUsername, ssoGithubEmail, ssoMicrosoftId, ssoMicrosoftEmail, ssoOidcId, and ssoOidcEmail through PATCH /api/users/:id. The whitelist in server/api/controllers/users/update.js mass assigns these backend-managed identity attributes from user input. An attacker can place a victim's provider identifier on an attacker-controlled account, causing the default lookup in helpers such as server/api/helpers/users/get-create-one-for-github-sso.js to match the victim's first SSO login to the attacker's account before the email-linkage flow runs. The victim is logged into the attacker-controlled account, and projects, boards, or data the victim creates remain accessible through the attacker's original local credentials. This issue is fixed in version 3.3.9.","publishedAt":"2026-08-18T21:34:59.454Z","updatedAt":"2026-08-19T16:12:54.624Z","severity":{"score":7.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["RARgames 4gaBoards"],"affected":[{"vendor":"RARgames","product":"4gaBoards","versions":[{"version":"< 3.3.9","status":"affected"}]}],"references":["https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3","https://github.com/RARgames/4gaBoards/commit/7a79f4c5d338614058515752abd67e49ee2818bb","https://github.com/RARgames/4gaBoards/releases/tag/v3.3.9"],"weaknesses":["CWE-287","CWE-915"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53958.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53958","state":"PUBLISHED","datePublished":"2026-08-18T21:34:59.454Z","dateUpdated":"2026-08-19T16:12:54.624Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-11T15:50:01.282Z"},"containers":{"cna":{"title":"4gaBoards: SSO Pre-Account Takeover / Hijacking via Mass Assignment","descriptions":[{"lang":"en","value":"4gaBoards is a boards system for realtime project management. Prior to 3.3.9, 4gaBoards allows an authenticated user to modify ssoGoogleId, ssoGoogleEmail, ssoGithubId, ssoGithubUsername, ssoGithubEmail, ssoMicrosoftId, ssoMicrosoftEmail, ssoOidcId, and ssoOidcEmail through PATCH /api/users/:id. The whitelist in server/api/controllers/users/update.js mass assigns these backend-managed identity attributes from user input. An attacker can place a victim's provider identifier on an attacker-controlled account, causing the default lookup in helpers such as server/api/helpers/users/get-create-one-for-github-sso.js to match the victim's first SSO login to the attacker's account before the email-linkage flow runs. The victim is logged into the attacker-controlled account, and projects, boards, or data the victim creates remain accessible through the attacker's original local credentials. This issue is fixed in version 3.3.9."}],"affected":[{"vendor":"RARgames","product":"4gaBoards","versions":[{"version":"< 3.3.9","status":"affected"}]}],"references":[{"url":"https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3","name":"https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/RARgames/4gaBoards/commit/7a79f4c5d338614058515752abd67e49ee2818bb","name":"https://github.com/RARgames/4gaBoards/commit/7a79f4c5d338614058515752abd67e49ee2818bb","tags":["x_refsource_MISC"]},{"url":"https://github.com/RARgames/4gaBoards/releases/tag/v3.3.9","name":"https://github.com/RARgames/4gaBoards/releases/tag/v3.3.9","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-915","lang":"en","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-18T21:34:59.454Z"},"source":{"advisory":"GHSA-j2fw-r2gj-hfr3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-19T16:11:43.992653Z","id":"CVE-2026-53958","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-19T16:12:54.624Z"}}]}}}