CVE-2020-18703

9.8 criticalEPSS 2.8%

Critical (9.8) in quokka project quokka. EPSS 2.8% chance of exploitation in the next 30 days.

XML External Entities (XXE) in Quokka v0.4.0 allows remote attackers to execute arbitrary code via the component 'quokka/utils/atom.py'.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 2.8% chance of exploitation in the next 30 days; higher than 86% of CVEs (scores of 2026-10-31)
CWE: CWE-611
Published: 2021-08-16
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-3xg5-6c3j-vp8x	PyPI	quokka	<=0.4.0	no fix published
PYSEC-2021-144	PyPI	quokka	all versions	no fix published