{"id":"CVE-2020-7961","kind":"vulnerability","aliases":["CVE-2020-7961"],"related":[],"title":"Liferay Liferay Portal: Liferay Portal Deserialization of Untrusted Data Vulnerability","description":"Liferay Portal contains a deserialization of untrusted data vulnerability that allows remote attackers to execute code via JSON web services.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Liferay Portal deserializes untrusted data sent to its JSON web services, so a remote attacker can send a crafted request and execute code on the server. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":9.8,"epss":0.99905,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Liferay Liferay Portal","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","java","liferay","runtime","self-hosted"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the update from Liferay per vendor instructions (CISA required action); the sources do not name the fixed version.","status":"open","published_at":"2020-03-20T19:15:12+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:39:17+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-23T21:39:17Z","model":"claude-haiku-5-5","output":{"fix":"Apply the update from Liferay per vendor instructions (CISA required action); the sources do not name the fixed version.","reach":"internet","impact":"high","summary":"Liferay Portal deserializes untrusted data sent to its JSON web services, so a remote attacker can send a crafted request and execute code on the server. CISA lists it as actively exploited in the wild.","category":"runtime","who_cares":["liferay","java","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker executes code on the Liferay server remotely","analyst_note":"Find the affected and fixed Liferay Portal versions and the JSON web services exposure details from the Liferay advisory or NVD entry for CVE-2020-7961; the sources here give no version range.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000455,"input_tokens":2832,"output_tokens":344,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the affected and fixed Liferay Portal versions and the JSON web services exposure details from the Liferay advisory or NVD entry for CVE-2020-7961; the sources here give no version range.","search":"'-2020':12A,15A '-7961':13A,16A 'action':84C 'activ':57B 'allow':72C 'appli':85C 'attack':41B,74C 'cisa':53B,82C 'code':49B,77C 'contain':64C 'craft':45B 'cve':11A,14A 'data':9A,31B,69C 'deseri':6A,29B,66C 'execut':48B,76C 'exploit':20B,58B 'host':26B 'instruct':89C 'java':21B 'json':35B,79C 'liferay':1A,2A,4A,17A,18A,22B,27B,62C 'list':54B 'per':87C 'portal':3A,5A,19A,28B,63C 'remot':40B,73C 'request':46B 'requir':83C 'runtim':23B 'self':25B 'self-host':24B 'send':43B 'sent':32B 'server':52B 'servic':37B,81C 'untrust':8A,30B,68C 'updat':86C 'vendor':88C 'via':78C 'vulner':10A,70C 'web':36B,80C 'wild':61B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2020-03-20T19:15:12+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:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2020-7961","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-7961","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":"2026-10-25T14:39:41+00:00","note":null},{"source":"epss","external_id":"CVE-2020-7961","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-7961","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-2020-7961","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7961","severity":null,"published_at":"2020-03-20T19:15:12+00:00","modified_at":"2026-06-17T03:25:42+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}