# CVE-2026-78055: SourceCodester Class and Exam Timetabling System stored XSS in BSIT2.php

Source: https://junglewise.ai/threats/cve-2026-78055-sourcecodester-class-and-exam-timetabling-system-stored-xss-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-23. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-78055 · Severity: medium · CVSS 4.3 · Published 2026-08-23

SourceCodester Class and Exam Timetabling System is a web-based scheduling application used by educational institutions to manage course and exam timetables. The application contains a cross-site scripting (XSS) vulnerability in the course parameter that allows unauthenticated attackers to inject malicious scripts. Successful exploitation could enable attackers to steal student or staff session data, deface the timetable, or redirect users to phishing sites.

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-2026-78055 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78055 being exploited in the wild.

**How severe is CVE-2026-78055?** Medium severity, with a CVSS score of 4.3, published 23 August 2026.

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

**Is there a fix for CVE-2026-78055?** 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-2026-78055 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-78055?** 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

This is a reflected or stored cross-site scripting (XSS) vulnerability in the /BSIT2.php file, triggered via the 'course' parameter. The root cause is insufficient input validation and output encoding—user-supplied input is rendered directly into the HTML response without sanitization or proper encoding. No authentication is required; attackers can craft malicious URLs or inject payloads through the course parameter (e.g., <script>prompt(/xss/);</script>) to execute arbitrary JavaScript in victims' browsers. Successful exploitation allows theft of session cookies, credential harvesting, and account hijacking. No patch information is currently available; remediation requires output encoding, input filtering, and implementation of Content Security Policy (CSP).

## Affected products

- SourceCodester Class and Exam Timetabling System 1.0

## Timeline

- 2026-07-06: disclosed
- 2026-08-23: advisory

## References

- [https://github.com/i-QvQ-i/first-OvO/issues/11](https://github.com/i-QvQ-i/first-OvO/issues/11)
- [https://vuldb.com/cve/CVE-2026-78055](https://vuldb.com/cve/CVE-2026-78055)

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