{"cve":"CVE-2021-34337","nvd":{"published":"2023-04-15T20:16:00.623","modified":"2026-06-17T03:55:40.843","status":"Modified","description":"An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","score":6.3},"cwes":["CWE-208"],"references":["https://gitlab.com/mailman/mailman/-/commit/e4a39488c4510fcad8851217f10e7337a196bb51","https://gitlab.com/mailman/mailman/-/issues/911","https://gitlab.com/mailman/mailman/-/tags","https://gitlab.com/mailman/mailman/-/commit/e4a39488c4510fcad8851217f10e7337a196bb51","https://gitlab.com/mailman/mailman/-/issues/911"],"products":["gnu:mailman"],"source":"nvd","synced_at":"2026-10-19T21:38:05.473481323+00:00"},"epss":{"cve":"CVE-2021-34337","score":0.00302,"percentile":0.22975,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2jg5-xgvv-4wq7","url":"https://osv.dev/vulnerability/GHSA-2jg5-xgvv-4wq7","summary":"Mailman Core vulnerable to timing attacks","modified":"2026-02-22T22:56:10.942103Z","packages":[{"ecosystem":"PyPI","name":"mailman","purl":"pkg:pypi/mailman","ranges":["<3.3.5"],"fixed":["3.3.5"]}]},{"id":"PYSEC-2023-22","url":"https://osv.dev/vulnerability/PYSEC-2023-22","summary":"","modified":"2026-06-10T17:00:42.208843999Z","packages":[{"ecosystem":"PyPI","name":"mailman","purl":"pkg:pypi/mailman","ranges":["<3.3.5"],"fixed":["3.3.5"]}]}],"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."]}