{"id":"CVE-2017-16651","kind":"vulnerability","aliases":["CVE-2017-16651"],"related":[],"title":"Roundcube Roundcube Webmail: Roundcube Webmail File Disclosure Vulnerability","description":"Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including configuration files, as exploited in the wild in November 2017. The attacker must be able to authenticate at the target system with a valid username/password as the attack requires an active session. The issue is related to file-based attachment plugins and _task=settings&_action=upload-display&_from=timezone requests.","summary":"Roundcube Webmail, a web mail client, has a file disclosure flaw caused by weak input validation in its file-based attachment plugins, which are enabled by default. An attacker can read files on the server that the web mail process can access.","severity":"high","cvss":7.8,"epss":0.45742,"exploited":true,"exploited_at":"2021-11-03T00:00:00+00:00","products":[{"name":"Roundcube Roundcube Webmail","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","package","roundcube","self-hosted","webmail"],"not_affected_if":["managed-hosting"],"how_to_check":null,"fix":"Apply the vendor update per Roundcube's advisory; the fixed version is unknown from the sources.","status":"open","published_at":"2017-11-09T14:29:00+00:00","first_seen_at":"2026-10-23T19:11:53+00:00","triaged_at":"2026-10-23T21:41:26+00:00","updated_at":"2026-10-23T21:57:34+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T21:41:26Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor update per Roundcube's advisory; the fixed version is unknown from the sources.","reach":"internet","impact":"medium","summary":"Roundcube Webmail, a web mail client, has a file disclosure flaw caused by weak input validation in its file-based attachment plugins, which are enabled by default. An attacker can read files on the server that the web mail process can access.","category":"package","who_cares":["roundcube","self-hosted","webmail"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker reads arbitrary server files readable by the webmail process","analyst_note":"Find the fixed Roundcube version and the affected attachment plugins in the Roundcube advisory for CVE-2017-16651; the sources give neither.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["managed-hosting"],"user_interaction":"unknown","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000454,"input_tokens":2843,"output_tokens":340,"severity_before":"unknown"},"analyst_status":"queued","analyst_note":"Find the fixed Roundcube version and the affected attachment plugins in the Roundcube advisory for CVE-2017-16651; the sources give neither.","search":"'-16651':11A,14A '-2017':10A,13A '1.1.10':71C '1.2':72C '1.2.7':75C '1.3':77C '1.3.3':80C '2017':102C 'abl':107C 'access':67B,83C 'action':138C 'activ':123C 'allow':81C 'arbitrari':85C 'attach':46B,133C 'attack':54B,104C,120C 'authent':109C 'base':45B,132C 'caus':36B 'client':30B 'configur':93C 'cve':9A,12A 'default':52B 'disclosur':7A,34B 'display':141C 'enabl':50B 'exploit':18B,96C 'file':6A,33B,44B,57B,86C,94C,131C 'file-bas':43B,130C 'filesystem':91C 'flaw':35B 'host':23B,89C 'includ':92C 'input':39B 'issu':126C 'mail':29B,64B 'must':105C 'novemb':101C 'packag':19B 'plugin':47B,134C 'process':65B 'read':56B 'relat':128C 'request':144C 'requir':121C 'roundcub':1A,2A,4A,20B,25B,68C 'roundcube':15A,16A 'self':22B 'self-host':21B 'server':60B 'session':124C 'set':137C 'system':113C 'target':112C 'task':136C 'timezon':143C 'unauthor':82C 'upload':140C 'upload-display':139C 'username/password':117C 'valid':40B,116C 'vulner':8A 'weak':38B 'web':28B,63B 'webmail':3A,5A,17A,24B,26B,69C 'wild':99C 'x':73C,78C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2017-11-09T14:29:00+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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2017-16651","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-16651","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":"2026-10-25T11:39:18+00:00","note":null},{"source":"epss","external_id":"CVE-2017-16651","url":"https://api.first.org/data/v1/epss?cve=CVE-2017-16651","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-2017-16651","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-16651","severity":null,"published_at":"2017-11-09T14:29:00+00:00","modified_at":"2026-06-17T01:09:37+00:00","first_seen_at":"2026-10-23T21:57:34+00:00","fetched_at":"2026-10-23T21:57:34+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"}