{"id":"CVE-2018-19410","kind":"vulnerability","aliases":["CVE-2018-19410"],"related":[],"title":"paessler prtg network monitor: PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write…","description":"PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to create users with read-write privileges (including administrator). A remote unauthenticated user can craft an HTTP request and override attributes of the 'include' directive in /public/login.htm and perform a Local File Inclusion attack, by including /api/addusers and executing it. By providing the 'id' and 'users' parameters, an unauthenticated attacker can create a user with read-write privileges (including administrator).","summary":"Paessler PRTG Network Monitor has a local file inclusion flaw that lets a remote attacker with no account create users with read-write or administrator rights. 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":"2025-02-04T00:00:00+00:00","products":[{"name":"paessler prtg network monitor","fixed":["18.2.40.1683"],"affected":"< 18.2.40.1683","ecosystem":"vendor"},{"name":"Paessler PRTG Network Monitor","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","prtg","self-hosted","windows"],"not_affected_if":["unknown"],"how_to_check":null,"fix":"Apply the mitigations per the vendor's instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).","status":"open","published_at":"2018-11-21T16:29:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:52:36+00:00","updated_at":"2026-10-24T00:09:50+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:52:36Z","model":"claude-haiku-5-5","output":{"fix":"Apply the mitigations per the vendor's instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).\nunknown","reach":"internet","impact":"high","summary":"Paessler PRTG Network Monitor has a local file inclusion flaw that lets a remote attacker with no account create users with read-write or administrator rights. Listed in CISA's Known Exploited Vulnerabilities catalog, so attacks are happening in the wild.","category":"infrastructure","who_cares":["prtg","self-hosted","windows"],"confidence":0.6,"needs_auth":"no","worst_case":"Remote attacker creates administrator account and takes over monitoring server","analyst_note":"Find the vendor advisory and affected/fixed PRTG versions and the exact mitigation steps; sources give no version or check command.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["unknown"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000445,"input_tokens":2647,"output_tokens":360,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-19410':23A,26A '-2018':22A,25A '/api/addusers':130C '/public/login.htm':120C '18.2.40.1683':9A,88C 'account':59B 'administr':67B,102C,154C 'allow':10A,89C 'attack':13A,56B,78B,92C,127C,143C 'attribut':114C 'catalog':76B 'cisa':71B 'craft':108C 'creat':15A,60B,94C,145C 'cve':21A,24A 'direct':118C 'execut':132C 'exploit':35B,74B 'file':49B,125C 'flaw':51B 'happen':80B 'host':40B 'http':110C 'id':137C 'includ':101C,117C,129C,153C 'inclus':50B,126C 'infrastructur':36B 'known':73B 'let':53B 'list':69B 'local':48B,124C 'monitor':4A,7A,30A,34A,45B,86C 'network':3A,6A,29A,33A,44B,85C 'overrid':113C 'paessler':1A,27A,31A,42B 'paramet':140C 'perform':122C 'privileg':100C,152C 'provid':135C 'prtg':2A,5A,28A,32A,37B,43B,84C 'read':19A,64B,98C,150C 'read-writ':18A,63B,97C,149C 'remot':11A,55B,90C,104C 'request':111C 'right':68B 'self':39B 'self-host':38B 'unauthent':12A,91C,105C,142C 'user':16A,61B,95C,106C,139C,147C 'vulner':75B 'wild':83B 'window':41B 'write':20A,65B,99C,151C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2018-11-21T16:29:00+00:00","kev":{"dateAdded":"2025-02-04","dueDate":"2025-02-25","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-2018-19410","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-19410","severity":null,"published_at":"2025-02-04T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T11:39:14+00:00","note":null},{"source":"nvd","external_id":"CVE-2018-19410","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-19410","severity":null,"published_at":"2018-11-21T16:29:00+00:00","modified_at":"2026-06-17T01:49:15+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"}