{"id":"CVE-2018-15811","kind":"vulnerability","aliases":["CVE-2018-15811"],"related":[],"title":"DotNetNuke (DNN) DotNetNuke (DNN): DotNetNuke (DNN) Inadequate Encryption Strength Vulnerability","description":"DotNetNuke (DNN) contains an inadequate encryption strength vulnerability resulting from the use of a weak encryption algorithm to protect input parameters.\n\nCISA required action: Apply updates per vendor instructions.","summary":"DotNetNuke (DNN), a .NET web content management system, encrypts some input parameters with a weak algorithm. An attacker who can see or capture those encrypted values can recover or forge them, and CISA lists this flaw as actively exploited.","severity":"high","cvss":7.5,"epss":0.76304,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"DotNetNuke (DNN) DotNetNuke (DNN)","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["asp.net","dnn","dotnetnuke","exploited","runtime","windows"],"not_affected_if":["default-config"],"how_to_check":null,"fix":"Apply the DotNetNuke update per vendor instructions; the specific fixed version is not stated in the sources.","status":"open","published_at":"2019-07-03T17:15:10+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:33:41+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-10-23T21:33:41Z","model":"claude-haiku-5-5","output":{"fix":"Apply the DotNetNuke update per vendor instructions; the specific fixed version is not stated in the sources.","reach":"internet","impact":"medium","summary":"DotNetNuke (DNN), a .NET web content management system, encrypts some input parameters with a weak algorithm. An attacker who can see or capture those encrypted values can recover or forge them, and CISA lists this flaw as actively exploited.","category":"runtime","who_cares":["dotnetnuke","dnn","asp.net","windows"],"confidence":0.5,"needs_auth":"unknown","worst_case":"unknown; attacker may decrypt or forge protected parameters","analyst_note":"Find the fixed DNN version and the affected parameter/feature from the NVD or vendor advisory linked from the KEV entry, and a detection method.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000464,"input_tokens":2871,"output_tokens":353,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the fixed DNN version and the affected parameter/feature from the NVD or vendor advisory linked from the KEV entry, and a detection method.","search":"'-15811':13A,16A '-2018':12A,15A 'action':89C 'activ':64B 'algorithm':42B,82C 'appli':90C 'asp.net':21B 'attack':44B 'captur':49B 'cisa':59B,87C 'contain':68C 'content':32B 'cve':11A,14A 'dnn':2A,4A,6A,18A,20A,22B,28B,67C 'dotnetnuk':1A,3A,5A,23B,27B,66C 'dotnetnuke':17A,19A 'encrypt':8A,35B,51B,71C,81C 'exploit':24B,65B 'flaw':62B 'forg':56B 'inadequ':7A,70C 'input':37B,85C 'instruct':94C 'list':60B 'manag':33B 'net':30B 'paramet':38B,86C 'per':92C 'protect':84C 'recov':54B 'requir':88C 'result':74C 'runtim':25B 'see':47B 'strength':9A,72C 'system':34B 'updat':91C 'use':77C 'valu':52B 'vendor':93C 'vulner':10A,73C 'weak':41B,80C 'web':31B 'window':26B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-07-03T17:15:10+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:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2018-15811","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-15811","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":"2026-10-25T10:39:08+00:00","note":null},{"source":"epss","external_id":"CVE-2018-15811","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-15811","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-2018-15811","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-15811","severity":null,"published_at":"2019-07-03T17:15:10+00:00","modified_at":"2026-06-17T01:43:08+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"}