What is CVE-2023-40984?

CVE-2023-40984 is a medium-severity vulnerability in Webmin, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-09-15.

How severe is CVE-2023-40984?

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

XSS in Webmin

CVE-2023-40984

A reflected cross-site scripting (XSS) vulnerability in the File Manager function of Webmin v2.100 allows attackers to execute malicious scripts via injecting a crafted payload into the Replace in Results file.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-09-15 · last modified 2026-07-09.

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.

EPSS exploit prediction

EPSS: 0.005 (38.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Webmin — versions 2.100

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
github.com/Vi39/Webmin-2.100/blob/main/CVE-2023-40984 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-40984?: CVE-2023-40984 is a medium-severity vulnerability in Webmin, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-09-15.
How severe is CVE-2023-40984?: Medium severity. CVSS v3 base score is 5.4 out of 10.