{"cve":"CVE-2020-23622","nvd":{"published":"2022-08-15T20:15:09.040","modified":"2026-06-17T03:04:52.650","status":"Modified","description":"An issue in the UPnP protocol in 4thline cling 2.0.0 through 2.1.2 allows remote attackers to cause a denial of service via an unchecked CALLBACK parameter in the request header","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-918"],"references":["https://github.com/4thline/cling/issues/253","https://zh-cn.tenable.com/blog/cve-2020-12695-callstranger-vulnerability-in-universal-plug-and-play-upnp-puts-billions-of?tns_redirect=true","https://github.com/4thline/cling/issues/253","https://zh-cn.tenable.com/blog/cve-2020-12695-callstranger-vulnerability-in-universal-plug-and-play-upnp-puts-billions-of?tns_redirect=true"],"products":["cling_project:cling"],"source":"nvd","synced_at":"2026-10-19T21:34:18.502168378+00:00"},"epss":{"cve":"CVE-2020-23622","score":0.01123,"percentile":0.66251,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c438-6f6r-pg8w","url":"https://osv.dev/vulnerability/GHSA-c438-6f6r-pg8w","summary":"4thline cling uPnP protocol issue can lead to denial of service","modified":"2023-11-08T04:03:06.096989Z","packages":[{"ecosystem":"Maven","name":"org.fourthline.cling:cling-core","purl":"pkg:maven/org.fourthline.cling/cling-core","ranges":[">=2.0.0 <=2.1.2"],"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."]}