{"cve":"CVE-2020-18703","nvd":{"published":"2021-08-16T18:15:07.170","modified":"2026-06-17T02:59:25.350","status":"Modified","description":"XML External Entities (XXE) in Quokka v0.4.0 allows remote attackers to execute arbitrary code via the component 'quokka/utils/atom.py'.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-611"],"references":["https://github.com/rochacbruno/quokka/issues/676","https://github.com/rochacbruno/quokka/issues/676"],"products":["quokka_project:quokka"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2020-18703","score":0.02771,"percentile":0.86324,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-3xg5-6c3j-vp8x","url":"https://osv.dev/vulnerability/GHSA-3xg5-6c3j-vp8x","summary":"Improper Restriction of XML External Entity Reference in Quokka","modified":"2024-10-16T21:35:15.651882Z","packages":[{"ecosystem":"PyPI","name":"quokka","purl":"pkg:pypi/quokka","ranges":["<=0.4.0"],"fixed":[]}]},{"id":"PYSEC-2021-144","url":"https://osv.dev/vulnerability/PYSEC-2021-144","summary":"","modified":"2023-11-08T04:02:44.406599Z","packages":[{"ecosystem":"PyPI","name":"quokka","purl":"pkg:pypi/quokka","ranges":["all versions"],"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."]}