{"id":"CVE-2013-2251","kind":"vulnerability","aliases":["CVE-2013-2251"],"related":[],"title":"Apache Struts: Apache Struts Improper Input Validation Vulnerability","description":"Apache Struts 2.0.0 through 2.3.15 allows remote attackers to execute arbitrary OGNL expressions via a parameter with a crafted (1) action:, (2) redirect:, or (3) redirectAction: prefix.","summary":"Apache Struts allows remote attackers to execute arbitrary OGNL expressions through crafted requests. An attacker can run code on the server hosting the Struts application.","severity":"critical","cvss":9.8,"epss":0.99998,"exploited":true,"exploited_at":"2022-03-25T00:00:00+00:00","products":[{"name":"Apache Struts","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apache-struts","exploited","java","runtime","struts"],"not_affected_if":["not-struts"],"how_to_check":null,"fix":"Apply updates per vendor instructions; the specific fixed version is not stated in the sources.","status":"open","published_at":"2013-07-20T03:37:30+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:22:06+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-23T21:22:06Z","model":"claude-haiku-5-5","output":{"fix":"Apply updates per vendor instructions; the specific fixed version is not stated in the sources.","reach":"internet","impact":"high","summary":"Apache Struts allows remote attackers to execute arbitrary OGNL expressions through crafted requests. An attacker can run code on the server hosting the Struts application.","category":"runtime","who_cares":["struts","java","apache-struts"],"confidence":0.7,"needs_auth":"no","worst_case":"Remote code execution on the server running the Struts application","analyst_note":"Find the affected and fixed Struts versions and the specific parameter or feature that triggers OGNL evaluation, via the NVD entry for CVE-2013-2251 and the Apache Struts security bulletin.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["not-struts"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000443,"input_tokens":2815,"output_tokens":323,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2013':10A,13A '-2251':11A,14A '1':68C '2':70C '2.0.0':51C '2.3.15':53C '3':73C 'action':69C 'allow':26B,54C 'apach':1A,3A,18B,24B,49C 'apache':15A 'apache-strut':17B 'applic':48B 'arbitrari':31B,59C 'attack':28B,38B,56C 'code':41B 'craft':35B,67C 'cve':9A,12A 'execut':30B,58C 'exploit':20B 'express':33B,61C 'host':45B 'improp':5A 'input':6A 'java':21B 'ognl':32B,60C 'paramet':64C 'prefix':75C 'redirect':71C 'redirectact':74C 'remot':27B,55C 'request':36B 'run':40B 'runtim':22B 'server':44B 'strut':2A,4A,19B,23B,25B,47B,50C 'struts':16A 'valid':7A 'via':62C 'vulner':8A","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2013-07-20T03:37:30+00:00","kev":{"dateAdded":"2022-03-25","dueDate":"2022-04-15","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-2013-2251","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-2251","severity":null,"published_at":"2022-03-25T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:17+00:00","note":null},{"source":"epss","external_id":"CVE-2013-2251","url":"https://api.first.org/data/v1/epss?cve=CVE-2013-2251","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-2013-2251","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-2251","severity":null,"published_at":"2013-07-20T03:37:30+00:00","modified_at":"2026-06-16T23:53:01+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"}