{"id":"CVE-2023-1671","kind":"vulnerability","aliases":["CVE-2023-1671"],"related":[],"title":"A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version…","description":"Sophos Web Appliance contains a command injection vulnerability in the warn-proceed handler that allows for remote code execution.\n\nCISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","summary":"Sophos Web Appliance has a command injection flaw in its warn-proceed handler that lets a remote attacker run code. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":9.8,"epss":null,"exploited":true,"exploited_at":"2023-11-16T00:00:00+00:00","products":[{"name":"sophos web appliance","fixed":["4.3.10.4"],"affected":"< 4.3.10.4","ecosystem":"vendor"},{"name":"Sophos Web Appliance","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","self-hosted","sophos-web-appliance"],"not_affected_if":["not-running-sophos-web-appliance"],"how_to_check":null,"fix":"Apply the mitigations per Sophos vendor instructions, or discontinue use of the appliance if mitigations are unavailable.","status":"open","published_at":"2023-04-04T10:15:07+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T21:02:47+00:00","updated_at":"2026-10-24T00:09:51+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T21:02:47Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations per Sophos vendor instructions, or discontinue use of the appliance if mitigations are unavailable.","reach":"internet","impact":"high","summary":"Sophos Web Appliance has a command injection flaw in its warn-proceed handler that lets a remote attacker run code. CISA lists it as actively exploited in the wild.","category":"infrastructure","who_cares":["sophos-web-appliance","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary commands on the appliance remotely.","analyst_note":"Find Sophos advisory for CVE-2023-1671 for affected versions, fixed builds, and exact mitigation steps; sources give none.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["not-running-sophos-web-appliance"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"critical"},"cost_usd":0.000452,"input_tokens":2803,"output_tokens":343,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-1671':23A,26A '-2023':22A,25A 'action':94C 'activ':67B 'allow':87C 'appli':95C 'applianc':17A,41B,44B,74C 'appliance':29A,32A 'attack':60B 'auth':4A 'cisa':63B,92C 'code':62B,90C 'command':5A,47B,77C 'contain':75C 'cve':21A,24A 'discontinu':101C 'execut':91C 'exploit':33B,68B 'flaw':49B 'handler':13A,55B,85C 'host':37B 'infrastructur':34B 'inject':6A,48B,78C 'instruct':99C 'let':57B 'list':64B 'mitig':96C,107C 'older':18A 'per':97C 'pre':3A 'pre-auth':2A 'proceed':12A,54B,84C 'product':105C 'remot':59B,89C 'requir':93C 'run':61B 'self':36B 'self-host':35B 'sopho':15A,39B,42B,72C 'sophos':27A,30A 'sophos-web-appli':38B 'unavail':109C 'use':102C 'vendor':98C 'version':20A 'vulner':7A,79C 'warn':11A,53B,83C 'warn-proce':10A,52B,82C 'web':16A,28A,31A,40B,43B,73C 'wild':71B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-04-04T10:15:07+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":"security-alert@sophos.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-1671","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-1671","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":"2026-10-25T11:39:15+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-1671","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1671","severity":null,"published_at":"2023-04-04T10:15:07+00:00","modified_at":"2026-06-17T05:28:29+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"}