What is CVE-2020-8821?

CVE-2020-8821 is a medium-severity vulnerability in Webmin, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-10-12.

How severe is CVE-2020-8821?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2020-8821 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Webmin

CVE-2020-8821

An Improper Data Validation Vulnerability exists in Webmin 1.941 and earlier affecting the Command Shell Endpoint. A user may enter HTML code into the Command field and submit it. Then, after visiting the Action Logs Menu and displaying lo…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.802 (99.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Webmin
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

MauroEldritch/mauroeldritch

References

cve@mitre.org (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-8821?: CVE-2020-8821 is a medium-severity vulnerability in Webmin, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-10-12.
How severe is CVE-2020-8821?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-8821 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.