CVE Vulnerabilities

CVE-2020-18703

Improper Restriction of XML External Entity Reference

Published: Aug 16, 2021 | Modified: Jun 17, 2026
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

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

Weakness

The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Affected Software

NameVendorStart VersionEnd Version
QuokkaQuokka_project0.4.0 (including)0.4.0 (including)

Potential Mitigations

References