Improper Restriction of XML External Entity Reference in Quokka

CRITICAL 9.8CVE-2020-18703 · GHSA-3xg5-6c3j-vp8x · PYSEC-2021-144 · Published 16/08/2021 · updated 17/06/2026

In short

CVE-2020-18703 is a CRITICAL (CVSS 9.8) vulnerability affecting quokka, quokka (quokka project).
Chance of exploitation in the next 30 days (EPSS): 2.8%, higher than 86.4% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
quokka PyPI	`≤ 0.4.0all versions`	No fix yet
quokka quokka_project	`= 0.4.0`	No fix yet

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

NVD description

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

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