# CVE-2026-16486: SourceCodester Class and Exam Timetabling System XSS in BSIS.php

Source: https://junglewise.ai/threats/cve-2026-16486-sourcecodester-class-and-exam-timetabling-system-xss-in-bsis-php  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-21. Updated: 2026-07-22  
License: CC BY 4.0 with a link back

CVE-2026-16486 · Severity: medium · CVSS 4.3 · Published 2026-07-21

SourceCodester Class and Exam Timetabling System, a web-based application for managing academic schedules, is vulnerable to a security flaw that allows attackers to inject malicious scripts. By tricking a user into clicking a specially crafted link, an attacker could execute code in the user's browser to steal session information or perform unauthorized actions. This could lead to unauthorized access to the scheduling system or the compromise of user accounts.

Technologies: [SourceCodester Class and Exam Timetabling System](https://junglewise.ai/threats/technologies/class-and-exam-timetabling-system). Vendors: [SourceCodester](https://junglewise.ai/threats/vendors/sourcecodester).

## Quick answers

**Is CVE-2026-16486 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-16486 being exploited in the wild.

**How severe is CVE-2026-16486?** Medium severity, with a CVSS score of 4.3, published 21 July 2026.

**Which products and versions are affected?** SourceCodester Class and Exam Timetabling System 1.0.

**Is there a fix for CVE-2026-16486?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-16486 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-16486?** Check whether you run SourceCodester Class and Exam Timetabling System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A reflected cross-site scripting (XSS) vulnerability exists in SourceCodester Class and Exam Timetabling System 1.0 within the /BSIS.php file. The vulnerability is caused by insufficient sanitization of the 'day' parameter, which is directly reflected into the web page output. A remote, unauthenticated attacker can exploit this by persuading a user to visit a malicious URL containing a crafted script payload. Successful exploitation allows the attacker to execute arbitrary JavaScript in the context of the victim's browser, potentially leading to session hijacking (cookie theft) or unauthorized actions on behalf of the user. A public proof-of-concept using the payload <script>prompt(/xss/);</script> has been disclosed.

## Affected products

- SourceCodester Class and Exam Timetabling System 1.0

## Timeline

- 2026-06-16: disclosed: Vulnerability reported on GitHub repository
- 2026-07-21: advisory: CVE published to NVD dataset

## References

- [https://github.com/kurshidheba852-hub/My-cve-repository/issues/1](https://github.com/kurshidheba852-hub/My-cve-repository/issues/1)
- [https://vuldb.com/cve/CVE-2026-16486](https://vuldb.com/cve/CVE-2026-16486)
- [https://vuldb.com/submit/859907](https://vuldb.com/submit/859907)
- [https://vuldb.com/vuln/380944](https://vuldb.com/vuln/380944)
- [https://vuldb.com/vuln/380944/cti](https://vuldb.com/vuln/380944/cti)
- [https://www.sourcecodester.com/](https://www.sourcecodester.com/)

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