{"id":"CVE-2021-3374","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-3374","generatedAt":"2026-10-28T01:49:00.564Z","title":"Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.","description":"Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.","published":"2021-04-02T19:15:21.000Z","lastModified":"2026-06-17T04:05:00.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-22"],"affected":["rstudio/shiny server"],"epss":{"score":0.14424,"percentile":0.96601,"date":"2026-10-26","history":[]},"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 14.4%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://blog.rstudio.com/2021/01/13/shiny-server-1-5-16-update/","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/colemanjp/shinyserver-directory-traversal-source-code-leak","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://blog.rstudio.com/2021/01/13/shiny-server-1-5-16-update/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/colemanjp/shinyserver-directory-traversal-source-code-leak","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3374","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."}