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Vulnerability DatabaseCVE-2023-40053

CVE-2023-40053: 
Serv-U Managed File Transfer Server vulnerability analysis and mitigation

Overview

A vulnerability (CVE-2023-40053) was identified in SolarWinds Serv-U 15.4 that allows an authenticated actor to insert content on the file share function feature, which could be used maliciously. The vulnerability was disclosed on December 5, 2023, affecting Serv-U versions 15.4 HF2 and earlier (SolarWinds Advisory).

Technical details

The vulnerability has been assigned a CVSS v3.1 base score of 5.0 (Medium) with the following vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N. The vulnerability is classified as CWE-20 (Improper Input Validation) according to SolarWinds (NVD).

Impact

The vulnerability allows authenticated users to perform HTML injection through the file share function feature, potentially leading to malicious content insertion. The CVSS scoring indicates that while the vulnerability requires low attack complexity, it has limited impact on integrity with no direct effect on confidentiality or availability (NVD).

Mitigation and workarounds

SolarWinds has released version 15.4.1 to address this vulnerability. Users are advised to upgrade to this version to mitigate the security risk (Release Notes).

Additional resources

Source: This report was generated using AI

Related Serv-U Managed File Transfer Server vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-40549CRITICAL9.1
  • Serv-U Managed File Transfer ServerServ-U Managed File Transfer Server
  • cpe:2.3:a:solarwinds:serv-u
NoYesNov 18, 2025
CVE-2025-40548CRITICAL9.1
  • Serv-U Managed File Transfer ServerServ-U Managed File Transfer Server
  • cpe:2.3:a:solarwinds:serv-u
NoYesNov 18, 2025
CVE-2025-40547CRITICAL9.1
  • Serv-U Managed File Transfer ServerServ-U Managed File Transfer Server
  • cpe:2.3:a:solarwinds:serv-u
NoYesNov 18, 2025
CVE-2024-45712MEDIUM5.4
  • Serv-U Managed File Transfer ServerServ-U Managed File Transfer Server
  • cpe:2.3:a:solarwinds:serv-u
NoYesApr 15, 2025
CVE-2024-45714MEDIUM4.1
  • Serv-U Managed File Transfer ServerServ-U Managed File Transfer Server
  • cpe:2.3:a:solarwinds:serv-u
NoYesOct 16, 2024

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