{"id":"CVE-2020-2551","kind":"vulnerability","aliases":["CVE-2020-2551"],"related":[],"title":"Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components)","description":"Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: WLS Core Components). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).","summary":"Oracle Fusion Middleware's WebLogic Server WLS Core Components has an unspecified flaw reachable over IIOP. An unauthenticated attacker with network access can compromise the WebLogic Server.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2023-11-16T00:00:00+00:00","products":[{"name":"Oracle Fusion Middleware","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"oracle weblogic server","fixed":[],"affected":"= 10.3.6.0.0","ecosystem":"vendor"},{"name":"oracle weblogic server","fixed":[],"affected":"= 12.1.3.0.0","ecosystem":"vendor"},{"name":"oracle weblogic server","fixed":[],"affected":"= 12.2.1.3.0","ecosystem":"vendor"},{"name":"oracle weblogic server","fixed":[],"affected":"= 12.2.1.4.0","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","java","oracle-fusion-middleware","vendor","weblogic"],"not_affected_if":["default-config"],"how_to_check":null,"fix":"Apply the Oracle patch or mitigation for CVE-2020-2551 per Oracle's advisory, or discontinue use of the product if mitigations are unavailable (CISA required action).","status":"open","published_at":"2020-01-15T17:15:17+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:02:48+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-23T21:02:48Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Oracle patch or mitigation for CVE-2020-2551 per Oracle's advisory, or discontinue use of the product if mitigations are unavailable (CISA required action).","reach":"network","impact":"high","summary":"Oracle Fusion Middleware's WebLogic Server WLS Core Components has an unspecified flaw reachable over IIOP. An unauthenticated attacker with network access can compromise the WebLogic Server.","category":"vendor","who_cares":["weblogic","oracle-fusion-middleware","java"],"confidence":0.7,"needs_auth":"no","worst_case":"Unauthenticated attacker compromises the WebLogic Server over IIOP","analyst_note":"Find the Oracle April 2020 CPU advisory and the affected WebLogic versions, plus IIOP-specific detection steps, from the Oracle security alert and the CISA KEV entry.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000477,"input_tokens":2835,"output_tokens":386,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2020':17A,20A '-2551':18A,21A '/av':141C '10.3.6.0.0':93C '12.1.3.0.0':94C '12.2.1.3.0':95C '12.2.1.4.0':97C '3.0':128C,140C '9.8':131C 'access':66B,106C 'affect':91C 'allow':101C 'attack':63B,103C,115C 'avail':135C 'base':129C 'compon':12A,15A,53B,83C,86C 'compromis':68B,110C 'confidenti':132C 'core':14A,52B,85C 'cve':16A,19A 'cvss':127C,137C,139C 'easili':98C 'exploit':37B,99C 'flaw':57B 'fusion':10A,23A,41B,46B,81C 'h':149C 'h/a':148C 'h/i':147C 'iiop':60B,108C 'impact':136C 'integr':133C 'java':38B 'l/pr':143C 'middlewar':11A,42B,47B,82C 'middleware':24A 'n/ac':142C 'n/s':145C 'n/ui':144C 'network':65B,105C 'oracl':4A,9A,40B,45B,75C,80C,111C,124C 'oracle':22A,25A,28A,31A,34A 'oracle-fusion-middlewar':39B 'product':7A,78C 'reachabl':58B 'result':120C 'score':130C 'server':6A,27A,30A,33A,36A,50B,71B,77C,113C,126C 'success':114C 'support':87C 'takeov':122C 'u/c':146C 'unauthent':62B,102C 'unspecifi':56B 'vector':138C 'vendor':43B 'version':88C 'via':107C 'vulner':1A,72C,100C,118C 'weblog':5A,44B,49B,70B,76C,112C,125C 'weblogic':26A,29A,32A,35A 'wls':13A,51B,84C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-01-15T17:15:17+00:00","kev":{"dateAdded":"2023-11-16","dueDate":"2023-12-07","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-2551","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-2551","severity":null,"published_at":"2023-11-16T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T16:39:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-2551","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2551","severity":null,"published_at":"2020-01-15T17:15:17+00:00","modified_at":"2026-06-17T03:12:20+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}