{"id":"CVE-2015-4852","kind":"vulnerability","aliases":["CVE-2015-4852"],"related":[],"title":"Oracle WebLogic Server: Oracle WebLogic Server Deserialization of Untrusted Data Vulnerability","description":"The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers to execute arbitrary commands via a crafted serialized Java object in T3 protocol traffic to TCP port 7001, related to oracle_common/modules/com.bea.core.apache.commons.collections.jar. NOTE: the scope of this CVE is limited to the WebLogic Server product.","summary":"Oracle WebLogic Server has a deserialization flaw in its bundled Apache Commons code that lets a remote attacker send crafted serialized data. An attacker can run code on the server.","severity":"critical","cvss":9.8,"epss":0.94991,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Oracle WebLogic Server","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","java","oracle-weblogic-server","runtime","weblogic"],"not_affected_if":["not-running-weblogic"],"how_to_check":null,"fix":"Apply Oracle's updates for WebLogic Server per vendor instructions; CISA requires updates per vendor instructions. Specific fixed versions: unknown","status":"open","published_at":"2015-11-18T15:59:00+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:37:36+00:00","updated_at":"2026-10-23T21:57:34+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-23T21:37:36Z","model":"claude-haiku-5-5","output":{"fix":"Apply Oracle's updates for WebLogic Server per vendor instructions; CISA requires updates per vendor instructions. Specific fixed versions: unknown","reach":"internet","impact":"high","summary":"Oracle WebLogic Server has a deserialization flaw in its bundled Apache Commons code that lets a remote attacker send crafted serialized data. An attacker can run code on the server.","category":"runtime","who_cares":["weblogic","java","oracle-weblogic-server"],"confidence":0.7,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary code on the WebLogic server remotely","analyst_note":"Find Oracle's patch advisory and affected/fixed version list for CVE-2015-4852 and a way to detect exposed deployments; sources give no versions or checks.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["not-running-weblogic"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000465,"input_tokens":2841,"output_tokens":362,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find Oracle's patch advisory and affected/fixed version list for CVE-2015-4852 and a way to detect exposed deployments; sources give no versions or checks.","search":"'-2015':13A,16A '-4852':14A,17A '10.3.6.0':67C '12.1.2.0':68C '12.1.3.0':69C '12.2.1.0':71C '7001':92C 'allow':72C 'apach':39B 'arbitrari':77C 'attack':46B,52B,74C 'bundl':38B 'code':41B,55B 'command':78C 'common':40B 'common/modules/com.bea.core.apache.commons.collections.jar':96C 'compon':62C 'craft':48B,81C 'cve':12A,15A,102C 'data':10A,50B 'deseri':7A,34B 'execut':76C 'exploit':21B 'flaw':35B 'java':22B,83C 'let':43B 'limit':104C 'note':97C 'object':84C 'oracl':1A,4A,24B,29B,64C,95C 'oracle':18A 'oracle-weblogic-serv':23B 'port':91C 'product':109C 'protocol':87C 'relat':93C 'remot':45B,73C 'run':54B 'runtim':27B 'scope':99C 'secur':61C 'send':47B 'serial':49B,82C 'server':3A,6A,20A,26B,31B,58B,66C,108C 't3':86C 'tcp':90C 'traffic':88C 'untrust':9A 'via':79C 'vulner':11A 'weblog':2A,5A,25B,28B,30B,65C,107C 'weblogic':19A 'wls':60C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2015-11-18T15:59:00+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:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2015-4852","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2015-4852","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":"2026-10-25T17:39:59+00:00","note":null},{"source":"epss","external_id":"CVE-2015-4852","url":"https://api.first.org/data/v1/epss?cve=CVE-2015-4852","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:44+00:00","fetched_at":"2026-10-23T19:13:44+00:00","note":null},{"source":"nvd","external_id":"CVE-2015-4852","url":"https://nvd.nist.gov/vuln/detail/CVE-2015-4852","severity":null,"published_at":"2015-11-18T15:59:00+00:00","modified_at":"2026-06-17T00:28:02+00:00","first_seen_at":"2026-10-23T21:57:34+00:00","fetched_at":"2026-10-23T21:57:34+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"}