CVE-2023-40819Public exploitNetwork attack vector

HTML injection via unsanitized error message parameter

Published Aug 6, 2024 · Updated Aug 7, 2024

HTML injection in ID4Software ID4Portais 2022.837.002a and earlier allows remote attackers to alter rendered content via a crafted URL. The /error route reflects the message query parameter into its response without sanitization, causing attacker-supplied markup to render in the browser. Exploitation requires a victim to open the crafted link; published evidence demonstrates injected markup and a clickable link, not script execution or server-side data access.

CVSS severity6.1
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in ID4Software ID4Portais 2022.837.002a and earlier allows remote attackers to alter rendered content via a crafted URL. The /error route reflects the message query parameter into its response without sanitization, causing attacker-supplied markup to render in the browser. Exploitation requires a victim to open the crafted link; published evidence demonstrates injected markup and a clickable link, not script execution or server-side data access.

The record

CVE
CVE-2023-40819
Published
Aug 6, 2024
Updated
Aug 7, 2024
Vendor
ID4Software
Product
ID4Portais
Classifications
CWE-233, CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 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=2022.837.002a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ID4Software · ID4Portaisversion=2022.837.002a

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-233Improper Handling of Parameters
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

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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