CVE-2023-40047Network attack vector

Administrator browser script execution via certificate attributes

Published Sep 27, 2023 · Updated Sep 24, 2024

Stored XSS in WS_FTP Server 8.8.0 before 8.8.2 allows remote authenticated users to execute JavaScript in an administrator's browser. The Management module stores unneutralized script payloads supplied through malicious attributes of an imported SSL certificate. Exploitation requires administrative certificate-import privileges and subsequent delivery of the stored payload to a WS_FTP Server administrator.

CVSS severity4.8
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in WS_FTP Server 8.8.0 before 8.8.2 allows remote authenticated users to execute JavaScript in an administrator's browser. The Management module stores unneutralized script payloads supplied through malicious attributes of an imported SSL certificate. Exploitation requires administrative certificate-import privileges and subsequent delivery of the stored payload to a WS_FTP Server administrator.

The record

CVE
CVE-2023-40047
Published
Sep 27, 2023
Updated
Sep 24, 2024
Vendor
Progress Software Corporation
Product
WS_FTP Server
Classifications
CWE-79, CAPEC-63, T1189
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.8.0 <8.8.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Progress Software Corporation · WS_FTP Serverversion=8.8.0 <8.8.2

Published CVSS scores

8.3Progress Software CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
4.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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