CVE-2019-18233Network attack vector

Reflected XSS via unescaped error responses

Published Mar 17, 2021 · Updated Aug 5, 2024

Reflected XSS in Advantech SPECTRE RT ERT351 5.1.3 and earlier allows remote attackers to alter browser content via error responses. The web management interface returns special characters in error messages without neutralizing them before page generation. Exploitation is unauthenticated but requires a user to open a crafted request; script execution is confined to that user's browser context.

CVSS severity4.3
Medium
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Advantech SPECTRE RT ERT351 5.1.3 and earlier allows remote attackers to alter browser content via error responses. The web management interface returns special characters in error messages without neutralizing them before page generation. Exploitation is unauthenticated but requires a user to open a crafted request; script execution is confined to that user's browser context.

The record

CVE
CVE-2019-18233
Published
Mar 17, 2021
Updated
Aug 5, 2024
Vendor
Advantech
Product
SPECTRE RT
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=5.1.3 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Advantech · SPECTRE RTversion=5.1.3 and prior

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
4.3AdvantechCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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