{"schemaVersion":3,"id":"CVE-2020-25289","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The VPN service in AVAST SecureLine before 5.6.4982.470 allows local users to write to arbitrary files via an Object Manager symbolic link from the log directory (which has weak permissions).","dates":{"published":"2020-09-13T19:35:21.000Z","modified":"2024-08-04T15:33:05.363Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":2.1,"severity":"low","vector":"AV:L/AC:L/Au:N/C:N/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00449,"percentile":0.37735,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00449},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00449,"percentile":0.37735}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00449,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00449,"percentile":0.37735}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_87A06A2BDE067489","name":"Exploit Reference (zeifan.my)","source":"reference","url":"http://zeifan.my/security/arbitrary%20file/eop/2020/07/21/avast-secureline-vpn-arb-file-eop.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access ('Link Following')","description":"The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/59.html"}],"affected":[{"vendor":"avast","product":"secureline_vpn","name":"secureline vpn","label":"secureline_vpn","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 5.6.4982.470","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.6.4982.470","eol":null,"hubHref":"/vendor/avast/secureline_vpn"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://zeifan.my/security/arbitrary%20file/eop/2020/07/21/avast-secureline-vpn-arb-file-eop.html","label":"zeifan.my/security/arbitrary%20file/eop/2020/07/21/avast-secureline-vpn-arb-file-eop.html","hostname":"zeifan.my","tags":["X Refsource MISC","Exploit","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-09-13T19:35:21.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T15:33:05.363Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":32,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T10:38:34.490Z","stale":false,"partial":false}}