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CVE-2026-16203— SourceCodester Class and Exam Timetabling System forCYS.php cross site scripting

Quick assessment

Affected
SourceCodester Class and Exam Timetabling System
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SourceCodester class and exam timetabling system是SourceCodester公司的课表管理系统。 SourceCodester Class and Exam Timetabling System 1.0版本存在安全漏洞，该漏洞源于对文件/forCYS.php中参数course的操作，可能导致跨站脚本攻击。

CVSS 3.5 · Low EPSS 0.35% · P26

Affected Version Matrix 1

VendorProduct Version RangeStatus
SourceCodester Class and Exam Timetabling System 1.0 affected
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I. Basic Information for CVE-2026-16203

Vulnerability Information
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Vulnerability Title
SourceCodester Class and Exam Timetabling System forCYS.php cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0. Affected by this issue is some unknown functionality of the file /forCYS.php. Such manipulation of the argument course leads to cross site scripting. The attack may be performed from remote. The exploit is publicly available and might be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
SourceCodester Class and Exam Timetabling System 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SourceCodester class and exam timetabling system是SourceCodester公司的课表管理系统。 SourceCodester Class and Exam Timetabling System 1.0版本存在安全漏洞，该漏洞源于对文件/forCYS.php中参数course的操作，可能导致跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SourceCodester Class and Exam Timetabling System 1.0 cpe:2.3:a:sourcecodester:class_and_exam_timetabling_system:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-16203

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III. Intelligence Information for CVE-2026-16203

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Security Blog Posts for CVE-2026-16203 (1)

Other References for CVE-2026-16203 (1)

Same Patch Batch · SourceCodester · 2026-07-19 · 5 CVEs total

CVE-2026-16227 7.3 HIGH SourceCodester Class and Exam Timetabling System edit_subject.php sql injection
CVE-2026-16228 7.3 HIGH SourceCodester Class and Exam Timetabling System edit_schoolyr.php sql injection
CVE-2026-16226 4.7 MEDIUM SourceCodester Pizzafy Ecommerce System admin_class_novo.php save_settings unrestricted up
CVE-2026-16202 3.5 LOW SourceCodester Class and Exam Timetabling System CYS.php cross site scripting

IV. Related Vulnerabilities

Same product: Class and Exam Timetabling System
Same vendor: SourceCodester
Same weakness: CWE-79

V. Comments for CVE-2026-16203

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