What is CVE-2020-18702?

CVE-2020-18702 is a medium-severity vulnerability in Quokka Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-16.

How severe is CVE-2020-18702?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Quokka Project

CVE-2020-18702

Cross Site Scripting (XSS) in Quokka v0.4.0 allows remote attackers to execute arbitrary code via the 'Username' parameter in the component 'quokka/admin/actions.py'.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.6th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Quokka Project — versions 0.4.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/rochacbruno/quokka/issues/675 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-18702?: CVE-2020-18702 is a medium-severity vulnerability in Quokka Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-16.
How severe is CVE-2020-18702?: Medium severity. CVSS v3 base score is 6.1 out of 10.