CVE-2026-3993Public exploitNetwork attack vector

Client-side script execution via reflected ID parameter

Published Mar 12, 2026 · Updated Mar 12, 2026

Reflected XSS in itsourcecode.com Payroll Management System 1.0 allows remote attackers to execute script in a victim's browser via a crafted URL. The manage_employee_deductions.php page writes the id URL parameter into its HTML response without sanitization or output encoding. No authentication is required, but a victim must open the attacker-supplied link; exploitation executes client-side code in that user's session.

CVSS severity4.3
Medium
EPSS probability0.27%
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 itsourcecode.com Payroll Management System 1.0 allows remote attackers to execute script in a victim's browser via a crafted URL. The manage_employee_deductions.php page writes the id URL parameter into its HTML response without sanitization or output encoding. No authentication is required, but a victim must open the attacker-supplied link; exploitation executes client-side code in that user's session.

The record

CVE
CVE-2026-3993
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
itsourcecode.com
Product
Payroll Management System
Classifications
CWE-94, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2026Record 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

itsourcecode.com · Payroll Management Systemversion=1.0

Published CVSS scores

5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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