CVE-2026-16156Public exploitNetwork attack vector

Browser script execution via unencoded day parameter

Published Jul 18, 2026 · Updated Jul 18, 2026

Reflected XSS in SourceCodester Class and Exam Timetabling System 1.0 allows remote authenticated users to run browser scripts. The /forexam.php handler writes the day parameter directly into the returned page without context-appropriate encoding or filtering. A low-privileged session and victim interaction are required; successful exploitation can perform unauthorized actions in the victim's application session.

CVSS severity3.5
Low
EPSS probability0.35%
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 SourceCodester Class and Exam Timetabling System 1.0 allows remote authenticated users to run browser scripts. The /forexam.php handler writes the day parameter directly into the returned page without context-appropriate encoding or filtering. A low-privileged session and victim interaction are required; successful exploitation can perform unauthorized actions in the victim's application session.

The record

CVE
CVE-2026-16156
Published
Jul 18, 2026
Updated
Jul 18, 2026
Vendor
Online Computer and Laptop Store Project
Product
Class and Exam Timetabling System
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 18, 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 privilegesauthenticated

What is affected?

Online Computer and Laptop Store Project · Class and Exam Timetabling Systemversion=1.0

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
2.0VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/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
Privilegesauthenticated
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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