{"id":"CVE-2020-5849","kind":"vulnerability","aliases":["CVE-2020-5849"],"related":[],"title":"Unraid Unraid: Unraid Authentication Bypass Vulnerability","description":"Unraid contains an authentication bypass vulnerability that allows attackers to gain access to the administrative interface. This CVE is chainable with CVE-2020-5847 for remote code execution.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Unraid contains an authentication bypass that lets an attacker reach the administrative web interface without valid credentials. The sources say it chains with CVE-2020-5847 to achieve remote code execution.","severity":"high","cvss":7.5,"epss":0.93243,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Unraid Unraid","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","unraid"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the Unraid update per vendor instructions; the fixed version is unknown from the sources.","status":"open","published_at":"2020-03-16T18:15:12+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T20:29:41+00:00","updated_at":"2026-10-23T20:29:41+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:29:41Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Unraid update per vendor instructions; the fixed version is unknown from the sources.","summary":"Unraid contains an authentication bypass that lets an attacker reach the administrative web interface without valid credentials. The sources say it chains with CVE-2020-5847 to achieve remote code execution.","category":"infrastructure","who_cares":["unraid","self-hosted"],"confidence":0.6,"analyst_note":"Find the fixed Unraid version and a check for the admin interface exposure in the vendor advisory or NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2020-5849.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"severity_if_unknown":"high"},"cost_usd":0.000345,"input_tokens":2103,"output_tokens":270,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2020':8A,11A,45B,74C '-5847':46B,75C '-5849':9A,12A 'access':63C 'achiev':48B 'action':82C 'administr':32B,66C 'allow':59C 'appli':83C 'attack':29B,60C 'authent':4A,24B,55C 'bypass':5A,25B,56C 'chain':42B 'chainabl':71C 'cisa':80C 'code':50B,78C 'contain':22B,53C 'credenti':37B 'cve':7A,10A,44B,69C,73C 'execut':51B,79C 'exploit':15B 'gain':62C 'host':19B 'infrastructur':16B 'instruct':87C 'interfac':34B,67C 'let':27B 'per':85C 'reach':30B 'remot':49B,77C 'requir':81C 'say':40B 'self':18B 'self-host':17B 'sourc':39B 'unraid':1A,2A,3A,13A,14A,20B,21B,52C 'updat':84C 'valid':36B 'vendor':86C 'vulner':6A,57C 'web':33B 'without':35B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-03-16T18:15:12+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-5849","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-5849","severity":null,"published_at":"2021-11-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:53+00:00","fetched_at":"2026-10-25T11:39:18+00:00","note":null},{"source":"epss","external_id":"CVE-2020-5849","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-5849","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:43+00:00","fetched_at":"2026-10-23T19:13:43+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-5849","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5849","severity":null,"published_at":"2020-03-16T18:15:12+00:00","modified_at":"2026-06-17T03:22:19+00:00","first_seen_at":"2026-10-23T19:35:23+00:00","fetched_at":"2026-10-23T19:35:23+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}