{"cve":"CVE-2021-20354","nvd":{"published":"2021-02-18T15:15:14.343","modified":"2026-06-17T03:33:43.840","status":"Modified","description":"IBM WebSphere Application Server 8.0, 8.5, and 9.0 could allow a remote attacker to traverse directories. An attacker could send a specially-crafted URL request containing \"dot dot\" sequences (/../) to view arbitrary files on the system. IBM X-Force ID: 194883.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-22"],"references":["https://exchange.xforce.ibmcloud.com/vulnerabilities/194883","https://www.ibm.com/support/pages/node/6415959","https://exchange.xforce.ibmcloud.com/vulnerabilities/194883","https://www.ibm.com/support/pages/node/6415959"],"products":["ibm:websphere_application_server"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2021-20354","score":0.04097,"percentile":0.90743,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}