SolarWinds Serv-U 15.5.4 < 2026.3 Multiple Vulnerabilities XSS

medium Nessus Plugin ID 328845

Synopsis

SolarWinds Serv-U is affected by a vulnerability

Description

The version of SolarWinds Serv-U installed on the remote host is prior to 2026.3. It is, therefore, affected by multiple vulnerabilities as referenced in the solarwinds_serv-u_2026_3 advisory.

- SolarWinds Serv-U was found to be affected by a stored cross-site scripting vulnerability that could lead to session hijacking or information disclosure from an administrator account. (CVE-2026-28315)

- SolarWinds Serv-U is affected by an insecure direct object reference vulnerability that leads to an account takeover. User authentication is required. The impact is lower in Windows deployments.
(CVE-2026-28314)

- SolarWinds Serv-U is affected by a broken access control vulnerability that allows a domain administrator to create system administrator accounts. The impact is lower in Windows deployments. (CVE-2026-28309)

- SolarWinds Serv-U is affected by a privilege escalation vulnerability that allows a domain administrator to escalate their user type to that of a system administrator. The impact is lower in Windows deployments.
(CVE-2026-28310)

- SolarWinds Serv-U is affected by an insecure direct object reference (IDOR) vulnerability that can lead to SMTP hijacking leading to arbitrary account takeover. The impact is lower in Windows deployments.
(CVE-2026-28313)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to SolarWinds Serv-U version 2026.3 or later.

Plugin Details

Severity: Medium

ID: 328845

File Name: solarwinds_solarwinds_serv-u_2026_3.nasl

Version: 1.1

Type: Remote

Family: FTP

Published: 7/21/2026

Updated: 7/21/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.3

Percentile: 51.08

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:C

CVSS Score Source: CVE-2026-28314

CVSS v3

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 5.4

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-28315

Vulnerability Information

CPE: cpe:/a:serv-u:serv-u, cpe:/a:solarwinds:serv-u, cpe:/a:solarwinds:serv-u_file_server

Required KB Items: installed_sw/Serv-U

Exploit Ease: No known exploits are available

Patch Publication Date: 7/21/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-28309, CVE-2026-28310, CVE-2026-28313, CVE-2026-28314, CVE-2026-28315

Detections

Analytics