{"id":"CVE-2020-2883","kind":"vulnerability","aliases":["CVE-2020-2883"],"related":[],"title":"Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core)","description":"Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). 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, T3 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 WebLogic Server has an unspecified flaw that an unauthenticated attacker can reach over the network through the IIOP or T3 protocols. It is listed in CISA's Known Exploited Vulnerabilities catalog, so attacks are happening in the wild.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2025-01-07T00:00:00+00:00","products":[{"name":"Oracle WebLogic Server","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","runtime","self-hosted","weblogic"],"not_affected_if":["managed-hosting","no-weblogic-deployed"],"how_to_check":null,"fix":"Apply the mitigations from Oracle's vendor instructions for CVE-2020-2883, or stop using the affected WebLogic Server if no mitigation is available.","status":"open","published_at":"2020-04-15T14:15:33+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:52:46+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T20:52:46Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations from Oracle's vendor instructions for CVE-2020-2883, or stop using the affected WebLogic Server if no mitigation is available.","reach":"network","impact":"high","summary":"Oracle WebLogic Server has an unspecified flaw that an unauthenticated attacker can reach over the network through the IIOP or T3 protocols. It is listed in CISA's Known Exploited Vulnerabilities catalog, so attacks are happening in the wild.","category":"runtime","who_cares":["weblogic","oracle","java","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"unauthenticated attacker may run code on the WebLogic server","analyst_note":"Find the affected WebLogic versions and Oracle's patch or mitigation steps for CVE-2020-2883 (Oracle Critical Patch Update, Jan 2020) and add concrete check and fix steps.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting","no-weblogic-deployed"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000469,"input_tokens":2641,"output_tokens":410,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2020':15A,18A '-2883':16A,19A '/av':150C '10.3.6.0.0':101C '12.1.3.0.0':102C '12.2.1.3.0':103C '12.2.1.4.0':105C '3.0':137C,149C '9.8':140C 'access':114C 'affect':99C 'allow':109C 'attack':53B,76B,111C,124C 'avail':144C 'base':138C 'catalog':74B 'cisa':69B 'compon':12A,93C 'compromis':119C 'confidenti':141C 'core':13A,94C 'cve':14A,17A 'cvss':136C,146C,148C 'easili':106C 'exploit':35B,72B,107C 'flaw':49B 'fusion':10A,91C 'h':158C 'h/a':157C 'h/i':156C 'happen':78B 'host':41B 'iiop':61B,116C 'impact':145C 'integr':142C 'java':36B 'known':71B 'l/pr':152C 'list':67B 'middlewar':11A,92C 'n/ac':151C 'n/s':154C 'n/ui':153C 'network':58B,113C 'oracl':4A,9A,37B,43B,85C,90C,120C,133C 'oracle':20A,23A,26A,29A,32A 'product':7A,88C 'protocol':64B 'reach':55B 'result':129C 'runtim':38B 'score':139C 'self':40B 'self-host':39B 'server':6A,22A,25A,28A,31A,34A,45B,87C,122C,135C 'success':123C 'support':95C 't3':63B,117C 'takeov':131C 'u/c':155C 'unauthent':52B,110C 'unspecifi':48B 'vector':147C 'version':96C 'via':115C 'vulner':1A,73B,82C,108C,127C 'weblog':5A,42B,44B,86C,121C,134C 'weblogic':21A,24A,27A,30A,33A 'wild':81B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-04-15T14:15:33+00:00","kev":{"dateAdded":"2025-01-07","dueDate":"2025-01-28","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-2020-2883","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-2883","severity":null,"published_at":"2025-01-07T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T11:39:15+00:00","note":null},{"source":"nvd","external_id":"CVE-2020-2883","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2883","severity":null,"published_at":"2020-04-15T14:15:33+00:00","modified_at":"2026-06-17T03:13:10+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+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"}