CVE-2026-5209Public exploitNetwork attack vector

Stored script execution via unneutralized user data

Published Mar 31, 2026 · Updated Mar 31, 2026

Stored XSS in SourceCodester Leave Application System 1.0 allows remote authenticated users to run script in another user's browser. The User Management Handler persists user-controlled account data and later renders it without neutralizing active HTML; public records do not identify the exact field. Administrative access is required to submit the payload, and another user must view the affected output; the reported consequence is limited to browser-side integrity.

CVSS severity2.4
Low
EPSS probability0.25%
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 SourceCodester Leave Application System 1.0 allows remote authenticated users to run script in another user's browser. The User Management Handler persists user-controlled account data and later renders it without neutralizing active HTML; public records do not identify the exact field. Administrative access is required to submit the payload, and another user must view the affected output; the reported consequence is limited to browser-side integrity.

The record

CVE
CVE-2026-5209
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
Online Computer and Laptop Store Project
Product
Leave Application System
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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 privilegesadmin

What is affected?

Online Computer and Laptop Store Project · Leave Application Systemversion=1.0

Published CVSS scores

2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
1.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007JavaScript/JScript

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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