What is CVE-2023-40053?

CVE-2023-40053 is a medium-severity vulnerability in Solarwinds Serv-U, classified under Improper Input Validation. CVSS score: 5.0/10. Published 2023-12-06.

How severe is CVE-2023-40053?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Improper input validation in Solarwinds Serv-U

CVE-2023-40053

A vulnerability has been identified within Serv-U 15.4 that allows an authenticated actor to insert content on the file share function feature of Serv-U, which could be used maliciously.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2023-12-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Solarwinds Serv-U — versions 15.4.0, 15.4 and previous versions

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.solarwinds.com/trust-center/security-advisories/CVE-2023-40053 (Vendor Advisory)
documentation.solarwinds.com/en/success_center/servu/content/release_notes/serv… (Release Notes)

Frequently asked questions

What is CVE-2023-40053?: CVE-2023-40053 is a medium-severity vulnerability in Solarwinds Serv-U, classified under Improper Input Validation. CVSS score: 5.0/10. Published 2023-12-06.
How severe is CVE-2023-40053?: Medium severity. CVSS v3 base score is 5.0 out of 10.