# CVE-2020-18703: PYSEC-2021-144 - XML External Entities (XXE) in Quokka v0.4.0 allows remote attackers to execute arbitrary code via the component 'quokka/utils/atom.py'.

Source: https://junglewise.ai/threats/cve-2020-18703-improper-restriction-of-xml-external-entity-reference-in-quokka  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-08-16  
License: CC BY 4.0 with a link back

CVE-2020-18703 · Severity: low · CVSS 3.1 · Published 2021-08-16

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

Technologies: [quokka (PyPI)](https://junglewise.ai/threats/technologies/quokka). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2020-18703 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-18703 being exploited in the wild.

**How severe is CVE-2020-18703?** Low severity, with a CVSS score of 3.1, published 16 August 2021.

**Which products and versions are affected?** quokka (PyPI) ECOSYSTEM:introduced=0, ECOSYSTEM:introduced=0,last_affected=0.4.0.

**Is there a fix for CVE-2020-18703?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2020-18703?** Check whether you run quokka (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- quokka (PyPI) ECOSYSTEM:introduced=0, ECOSYSTEM:introduced=0,last_affected=0.4.0

## Identifiers

- CVE-2020-18703
- GHSA-3xg5-6c3j-vp8x
- PYSEC-2021-144

## Related threats

- [Cross Site Scripting (XSS) in Quokka](https://junglewise.ai/threats/cve-2020-18702-cross-site-scripting-xss-in-quokka)
- [PYSEC-2021-145 - XML External Entities (XXE) in Quokka v0.4.0 allows remote attackers to execute arbitrary code via the component 'quokka/core/content/views.](https://junglewise.ai/threats/cve-2020-18705-improper-restriction-of-xml-external-entity-reference-in-quokka)