{"cve":"CVE-2020-13959","nvd":{"published":"2021-03-10T08:15:14.760","modified":"2026-06-17T02:54:00.697","status":"Modified","description":"The default error page for VelocityView in Apache Velocity Tools prior to 3.1 reflects back the vm file that was entered as part of the URL. An attacker can set an XSS payload file as this vm file in the URL which results in this payload being executed. XSS vulnerabilities allow attackers to execute arbitrary JavaScript in the context of the attacked website and the attacked user. This can be abused to steal session cookies, perform requests in the name of the victim or for phishing attacks.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["http://www.openwall.com/lists/oss-security/2021/03/10/2","https://lists.apache.org/thread.html/r6802a38c3041059e763a1aadd7b37fe95de75408144b5805e29b84e3%40%3Cuser.velocity.apache.org%3E","https://lists.apache.org/thread.html/r6802a38c3041059e763a1aadd7b37fe95de75408144b5805e29b84e3%40%3Cuser.velocity.apache.org%3E","https://lists.apache.org/thread.html/r6802a38c3041059e763a1aadd7b37fe95de75408144b5805e29b84e3%40%3Cuser.velocity.apache.org%3E","https://lists.apache.org/thread.html/r6802a38c3041059e763a1aadd7b37fe95de75408144b5805e29b84e3%40%3Cuser.velocity.apache.org%3E"],"products":["apache:velocity_tools","debian:debian_linux"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2020-13959","score":0.05723,"percentile":0.93039,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fh63-4r66-jc7v","url":"https://osv.dev/vulnerability/GHSA-fh63-4r66-jc7v","summary":"Cross-site scripting (XSS) in Apache Velocity Tools","modified":"2023-11-08T04:02:24.445339Z","packages":[{"ecosystem":"Maven","name":"org.apache.velocity.tools:velocity-tools-parent","purl":"pkg:maven/org.apache.velocity.tools/velocity-tools-parent","ranges":["<3.1"],"fixed":["3.1"]},{"ecosystem":"Maven","name":"org.apache.velocity:velocity-tools","purl":"pkg:maven/org.apache.velocity/velocity-tools","ranges":["<=2.0"],"fixed":[]}]}],"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."]}