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CVE-2020-18703

31
FAUCET Score

CVE-2020-18703 describes an XML External Entities (XXE) vulnerability in Quokka v0.4.0, specifically within the 'quokka/utils/atom.py' component. This critical vulnerability, with a CVSS score of 9.8, allows unauthenticated remote attackers to execute arbitrary code with low attack complexity. While the potential impact is severe, leading to complete compromise of confidentiality, integrity, and availability, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
0.4.0CPE matchmatch criteria
cpe:2.3:a:quokka_project:quokka:0.4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.77%
Probability of exploitation in next 30 days
EPSS Percentile
84.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0277 is in the 76th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

pipGHSA-3xg5-6c3j-vp8xcritical

Improper Restriction of XML External Entity Reference in Quokka

Aug 30, 2021

References

github.com / rochacbruno/quokka/issues/676
ExploitPatchThird Party Advisory