{"id":"CVE-2026-23480","state":"PUBLISHED","title":"Blinko: Low Privilege User Privilege Escalation - upsertUser Endpoint","description":"Blinko is an AI-powered card note-taking project. Prior to version 1.8.4, there is a privilege escalation vulnerability. The upsertUser endpoint has 3 issues: it is missing superAdminAuthMiddleware, any logged-in user can call it; the originalPassword is an optional parameter and if not provided password verification is skipped; there is no check for input.id === ctx.id (ownership verification). This could result in any authenticated user modifying other users' passwords, direct escalation to superadmin, and complete account takeover. This issue has been patched in version 1.8.4.","publishedAt":"2026-03-23T20:39:38.784Z","updatedAt":"2026-03-24T14:08:24.272Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["blinkospace blinko"],"affected":[{"vendor":"blinkospace","product":"blinko","versions":[{"version":"< 1.8.4","status":"affected"}]}],"references":["https://github.com/blinkospace/blinko/security/advisories/GHSA-r3mv-q7ww-86p6","https://github.com/blinkospace/blinko/commit/3afbdf486b6f371bdac5781dea6289749f2c4c03","https://github.com/blinkospace/blinko/releases/tag/1.8.4"],"weaknesses":["CWE-288"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23480.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23480","state":"PUBLISHED","datePublished":"2026-03-23T20:39:38.784Z","dateUpdated":"2026-03-24T14:08:24.272Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-01-13T15:47:41.627Z"},"containers":{"cna":{"title":"Blinko: Low Privilege User Privilege Escalation - upsertUser Endpoint","descriptions":[{"lang":"en","value":"Blinko is an AI-powered card note-taking project. Prior to version 1.8.4, there is a privilege escalation vulnerability. The upsertUser endpoint has 3 issues: it is missing superAdminAuthMiddleware, any logged-in user can call it; the originalPassword is an optional parameter and if not provided password verification is skipped; there is no check for input.id === ctx.id (ownership verification). This could result in any authenticated user modifying other users' passwords, direct escalation to superadmin, and complete account takeover. This issue has been patched in version 1.8.4."}],"affected":[{"vendor":"blinkospace","product":"blinko","versions":[{"version":"< 1.8.4","status":"affected"}]}],"references":[{"url":"https://github.com/blinkospace/blinko/security/advisories/GHSA-r3mv-q7ww-86p6","name":"https://github.com/blinkospace/blinko/security/advisories/GHSA-r3mv-q7ww-86p6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/blinkospace/blinko/commit/3afbdf486b6f371bdac5781dea6289749f2c4c03","name":"https://github.com/blinkospace/blinko/commit/3afbdf486b6f371bdac5781dea6289749f2c4c03","tags":["x_refsource_MISC"]},{"url":"https://github.com/blinkospace/blinko/releases/tag/1.8.4","name":"https://github.com/blinkospace/blinko/releases/tag/1.8.4","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-288","lang":"en","description":"CWE-288: Authentication Bypass Using an Alternate Path or Channel","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-23T20:39:38.784Z"},"source":{"advisory":"GHSA-r3mv-q7ww-86p6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-24T14:08:18.666791Z","id":"CVE-2026-23480","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-24T14:08:24.272Z"}}]}}}