{"id":"CVE-2019-13608","kind":"vulnerability","aliases":["CVE-2019-13608"],"related":[],"title":"Citrix StoreFront Server: Citrix StoreFront Server XML External Entity (XXE) Processing Vulnerability","description":"Citrix StoreFront Server contains an XML External Entity (XXE) processing vulnerability that may allow an unauthenticated attacker to retrieve potentially sensitive information.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Citrix StoreFront Server parses XML in a way that lets an unauthenticated attacker make it load external entities. An attacker can use this to read potentially sensitive files or data from the server.","severity":"high","cvss":7.5,"epss":0.30041,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Citrix StoreFront Server","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["citrix","exploited","on-prem","ransomware","storefront","vendor"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the Citrix update per vendor instructions; the sources do not name the fixed build.","status":"open","published_at":"2019-08-29T19:15:13+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:37:34+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T21:37:34Z","model":"claude-haiku-5-5","output":{"fix":"Apply the Citrix update per vendor instructions; the sources do not name the fixed build.","reach":"internet","impact":"medium","summary":"Citrix StoreFront Server parses XML in a way that lets an unauthenticated attacker make it load external entities. An attacker can use this to read potentially sensitive files or data from the server.","category":"vendor","who_cares":["citrix","storefront","on-prem"],"confidence":0.6,"needs_auth":"no","worst_case":"Unauthenticated attacker reads sensitive server files via XML external entities","analyst_note":"Find the Citrix advisory for CVE-2019-13608 and the fixed StoreFront versions, plus a detection method; KEV lists it as exploited and ransomware-linked, so check the vendor page.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000457,"input_tokens":2858,"output_tokens":343,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the Citrix advisory for CVE-2019-13608 and the fixed StoreFront versions, plus a detection method; KEV lists it as exploited and ransomware-linked, so check the vendor page.","search":"'-13608':15A,18A '-2019':14A,17A 'action':87C 'allow':76C 'appli':88C 'attack':42B,49B,79C 'cisa':85C 'citrix':1A,4A,19A,22B,30B,63C 'contain':66C 'cve':13A,16A 'data':59B 'entiti':9A,47B,70C 'exploit':23B 'extern':8A,46B,69C 'file':57B 'inform':84C 'instruct':92C 'let':39B 'load':45B 'make':43B 'may':75C 'on-prem':24B 'pars':33B 'per':90C 'potenti':55B,82C 'prem':26B 'process':11A,72C 'ransomwar':27B 'read':54B 'requir':86C 'retriev':81C 'sensit':56B,83C 'server':3A,6A,21A,32B,62B,65C 'storefront':2A,5A,20A,28B,31B,64C 'unauthent':41B,78C 'updat':89C 'use':51B 'vendor':29B,91C 'vulner':12A,73C 'way':37B 'xml':7A,34B,68C 'xxe':10A,71C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-08-29T19:15:13+00:00","kev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Known"},"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-2019-13608","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-13608","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":"2026-10-25T16:39:49+00:00","note":null},{"source":"epss","external_id":"CVE-2019-13608","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-13608","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-2019-13608","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-13608","severity":null,"published_at":"2019-08-29T19:15:13+00:00","modified_at":"2026-06-17T02:17:04+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"}