{"id":"CVE-2023-50455","aliases":["EUVD-2023-55244","GHSA-278r-xxvf-49rm"],"status":"published","title":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email...","description":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email address verification\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00701,"percentile":0.53534,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2023-12-10T00:00:00Z","modified":"2026-10-28T02:30:37Z","products":[{"vendor":"zammad","product":"zammad"}],"references":[{"url":"https://zammad.com/en/advisories/zaa-2023-06","tags":["x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-50455","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-278r-xxvf-49rm"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50455.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-50455","description":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email address verification\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).","status":"published","published":"2023-12-10T00:00:00Z","modified":"2024-08-28T15:21:46.918Z","updated_at":"2026-11-02T14:35:34.923818Z"}],"euvd":[{"id":"EUVD-2023-55244","description":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email address verification\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).","status":"published","published":"2023-12-10T00:00:00Z","modified":"2024-08-28T15:21:46Z","updated_at":"2026-11-03T00:56:09.376102Z"}],"ghsa":[{"id":"GHSA-278r-xxvf-49rm","title":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email...","description":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email address verification\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).","status":"published","published":"2023-12-10T21:30:28Z","modified":"2023-12-13T18:31:03Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:55:11.44614Z"}],"nvd":[{"id":"CVE-2023-50455","description":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email address verification\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).","status":"published","published":"2023-12-10T19:15:07.58Z","modified":"2026-06-17T06:39:39.947Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:08:54.010507Z"}],"osv":[{"id":"CVE-2023-50455","description":"An issue was discovered in Zammad before 6.2.0. Due to lack of rate limiting in the \"email address verification\" feature, an attacker could send many requests for a known address to cause Denial Of Service (generation of many emails, which would also spam the victim).","status":"published","published":"2023-12-10T00:00:00Z","modified":"2026-10-28T02:30:37.461904718Z","updated_at":"2026-11-02T15:44:35.245372Z"}]}}