CVE-2023-3840Network attack vector

Session-context script execution via daily report parameter

Published Jul 23, 2023 · Updated Oct 15, 2024

Cross-site scripting in Jahastech NxFilter 4.3.2.5 allows remote authenticated users to execute script via the daily report user parameter. The /report,daily.jsp endpoint fails to neutralize the user argument when generating page content, allowing browser-executable input into the response. A low-privileged user must induce another user to open the crafted request, enabling page-context actions or data access in that user's session.

CVSS severity6.1
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Jahastech NxFilter 4.3.2.5 allows remote authenticated users to execute script via the daily report user parameter. The /report,daily.jsp endpoint fails to neutralize the user argument when generating page content, allowing browser-executable input into the response. A low-privileged user must induce another user to open the crafted request, enabling page-context actions or data access in that user's session.

The record

CVE
CVE-2023-3840
Published
Jul 23, 2023
Updated
Oct 15, 2024
Vendor
Jahastech
Product
NxFilter
Classifications
CWE-79, T1204.001, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 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=4.3.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jahastech · NxFilterversion=4.3.2.5

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/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
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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