CVE-2020-22428

SolarWinds Serv-U before 15.1.6 Hotfix 3 is affected by Cross Site Scripting (XSS) via a directory name (entered by an admin) containing a JavaScript payload.

Published: 2021-05-05 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-22428 is rated Moderate Risk (51.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.92%). EPSS rose +1.87% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-22428

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-08 1.05% 2.92% +1.87%
2 2025-11-21 2.02% 1.05% -0.98%
3 2025-11-18 — 2.02% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-22428

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.7 2.7 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2020-22428

Affected software / configurations for CVE-2020-22428

Vendor Product Version Raw CPE
solarwinds serv-u_ftp_server 15.1 cpe:2.3:a:solarwinds:serv-u_ftp_server:15.1:*:*:*:*:*:*:*
solarwinds serv-u_mft_server 15.1 cpe:2.3:a:solarwinds:serv-u_mft_server:15.1:*:*:*:*:*:*:*

References for CVE-2020-22428

URL Tags
https://github.com/matrix Not Applicable Third Party Advisory
https://support.solarwinds.com/SuccessCenter/s/article/Serv-U-15-1-6-Hotfix-3?language=en_US Vendor Advisory
https://twitter.com/gm4tr1x Third Party Advisory
https://www.linkedin.com/in/gabrielegristina Permissions Required Third Party Advisory
cvelogic Threat Intelligence