{"cve":"CVE-2020-23478","nvd":{"published":"2021-09-22T20:15:08.077","modified":"2026-06-17T03:04:45.743","status":"Modified","description":"Leo Editor v6.2.1 was discovered to contain a regular expression denial of service (ReDoS) vulnerability in the component plugins/importers/dart.py.","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-697"],"references":["https://cwe.mitre.org/data/definitions/1333.html","https://github.com/leo-editor/leo-editor/issues/1597","https://cwe.mitre.org/data/definitions/1333.html","https://github.com/leo-editor/leo-editor/issues/1597"],"products":["leoeditor:leo"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2020-23478","score":0.01233,"percentile":0.69002,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-x38q-xg2h-rxgx","url":"https://osv.dev/vulnerability/GHSA-x38q-xg2h-rxgx","summary":"Regular Expression Denial of Service in Leo Editor","modified":"2024-09-27T22:10:59.101825Z","packages":[{"ecosystem":"PyPI","name":"leo","purl":"pkg:pypi/leo","ranges":["<6.3"],"fixed":["6.3"]}]},{"id":"PYSEC-2021-338","url":"https://osv.dev/vulnerability/PYSEC-2021-338","summary":"","modified":"2023-11-08T04:03:05.973737Z","packages":[{"ecosystem":"PyPI","name":"leo","purl":"pkg:pypi/leo","ranges":["<6.3"],"fixed":["6.3"]}]}],"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."]}