{"id":"CVE-2018-20251","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-20251","generatedAt":"2026-10-28T21:22:46.234Z","title":"In WinRAR versions prior to and including 5.61, there is path traversal vulnerability when crafting the filename field of the ACE format.","description":"In WinRAR versions prior to and including 5.61, there is path traversal vulnerability when crafting the filename field of the ACE format. The UNACE module (UNACEV2.dll) creates files and folders as written in the filename field even when WinRAR validator noticed the traversal attempt and requestd to abort the extraction process. the operation is cancelled only after the folders and files were created but prior to them being written, therefore allowing the attacker to create empty files and folders everywhere in the file system.","published":"2019-02-05T20:29:00.000Z","lastModified":"2026-06-17T01:52:34.000Z","status":"Modified","sourceIdentifier":"cve@checkpoint.com","cvss":{"version":"3.0","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},"cwe":["CWE-693","CWE-22"],"affected":["rarlab/winrar"],"epss":{"score":0.31404,"percentile":0.98271,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.06273,"percentile":0.93342},{"date":"2026-09-22","score":0.31528,"percentile":0.98207}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 31.4%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.31528,"from":0.06273,"percentile":0.98207},"summary":"EPSS moved from 6.3% to 31.5% probability of exploitation in the next thirty days."},{"kind":"epss","label":"EPSS jump","at":"2026-09-21T00:00:00.000Z","detail":{"to":0.06273,"from":0.31528,"percentile":0.93342},"summary":"EPSS moved from 31.5% to 6.3% probability of exploitation in the next thirty days."}],"references":[{"url":"http://www.securityfocus.com/bid/106948","tags":["Third Party Advisory","VDB Entry"],"source":"cve@checkpoint.com"},{"url":"https://research.checkpoint.com/extracting-code-execution-from-winrar/","tags":["Exploit","Third Party Advisory"],"source":"cve@checkpoint.com"},{"url":"https://www.win-rar.com/whatsnew.html","tags":["Release Notes","Vendor Advisory"],"source":"cve@checkpoint.com"},{"url":"http://www.securityfocus.com/bid/106948","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://research.checkpoint.com/extracting-code-execution-from-winrar/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.win-rar.com/whatsnew.html","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-20251","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}