---
id: CVE-2026-16155
title: >-
  A vulnerability was identified in SourceCodester Class and Exam Timetabling
  System 1.0
summary: >-
  A vulnerability was identified in SourceCodester Class and Exam Timetabling
  System 1.0. Affected by this issue is some unknown functionality of the file
  /schoolyr.php. The manipulation of the argument sy leads to cross site
  scripting. It…
severity: low
cvss: 3.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-79
  - CWE-94
published: '2026-07-18'
updated: '2026-07-18'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16155'
references:
  - url: 'https://github.com/justconter/cve/issues/4'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-16155'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/857080'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/379920'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/379920/cti'
    label: cna@vuldb.com
  - url: 'https://www.sourcecodester.com/'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-07-19T08:30:40.195Z'
epss: 0.00348
epssPercentile: 0.28512
---

## Overview

A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0. Affected by this issue is some unknown functionality of the file /schoolyr.php. The manipulation of the argument sy leads to cross site scripting. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.