{"cve":"CVE-2021-42009","nvd":{"published":"2021-10-12T08:15:06.920","modified":"2026-06-17T04:09:08.697","status":"Modified","description":"An authenticated Apache Traffic Control Traffic Ops user with Portal-level privileges can send a request with a specially-crafted email subject to the /deliveryservices/request Traffic Ops endpoint to send an email, from the Traffic Ops server, with an arbitrary body to an arbitrary email address. Apache Traffic Control 5.1.x users should upgrade to 5.1.3 or 6.0.0. 4.1.x users should upgrade to 5.1.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-20"],"references":["http://www.openwall.com/lists/oss-security/2021/10/12/1","https://lists.apache.org/thread.html/r78d471d8a4fd268a4c5ae6c47327c09d9d4b4467c31da2c97422febb%40%3Cdev.trafficcontrol.apache.org%3E","https://lists.apache.org/thread.html/r7dfa9a89b39d06caeeeb7b5cdc41b3493a9b86cc6cfa059d3f349d87%40%3Cannounce.apache.org%3E","https://lists.apache.org/thread.html/re384fd0f44c6d230f31376153c6e8b59e4a669f927c1533d06d702af%40%3Cdev.trafficcontrol.apache.org%3E","https://lists.apache.org/thread.html/rf0481b9e38ece1ece458d3ce7b2d671df819e3555597f31fc34f084e%40%3Ccommits.trafficcontrol.apache.org%3E"],"products":["apache:traffic_control"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-42009","score":0.02824,"percentile":0.86589,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gw97-f6h8-gm94","url":"https://osv.dev/vulnerability/GHSA-gw97-f6h8-gm94","summary":"Email relay in Apache Traffic Control","modified":"2024-08-21T15:41:38.754243Z","packages":[{"ecosystem":"Go","name":"github.com/apache/trafficcontrol","purl":"pkg:golang/github.com/apache/trafficcontrol","ranges":["<5.1.3"],"fixed":["5.1.3"]}]},{"id":"GO-2022-0602","url":"https://osv.dev/vulnerability/GO-2022-0602","summary":"Email relay in Apache Traffic Control in github.com/apache/trafficcontrol","modified":"2026-03-03T04:50:44.304023Z","packages":[{"ecosystem":"Go","name":"github.com/apache/trafficcontrol","purl":"pkg:golang/github.com/apache/trafficcontrol","ranges":["<5.1.3+incompatible"],"fixed":["5.1.3+incompatible"]}]}],"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."]}