Is CVE-2026-78054 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-78054 being exploited in the wild.

How severe is CVE-2026-78054?

Medium severity, with a CVSS score of 4.3, published 23 August 2026.

Is there a fix for CVE-2026-78054?

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-2026-78054 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-78054?

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.

CVE-2026-78054: SourceCodester Class and Exam Timetabling System XSS in BSIS1.php

CVE-2026-78054 · Severity: medium · CVSS 4.3 · Published 2026-08-23

SourceCodester's Class and Exam Timetabling System is a PHP web application used for managing course schedules and exam timetables in educational institutions. The application contains a cross-site scripting (XSS) vulnerability in the BSIS1.php file that allows attackers to inject malicious scripts through the course parameter without authentication, potentially enabling theft of user session data, account compromise, or malware distribution.

Technologies: SourceCodester Class and Exam Timetabling System. Vendors: SourceCodester.

Quick answers

Is CVE-2026-78054 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-78054 being exploited in the wild.
How severe is CVE-2026-78054?: 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-2026-78054?: 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-2026-78054 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-78054?: 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 the BSIS1.php file of SourceCodester's Class and Exam Timetabling System version 1.0. The vulnerable component fails to properly encode or filter user input from the 'course' parameter before reflecting it back to the web page. An attacker can craft a malicious URL containing JavaScript code (e.g., <script>prompt(/xss/);</script>) in the course parameter and trick a user into clicking the link. The injected script executes in the victim's browser with their session context, allowing theft of session cookies, credentials, or performance of actions on behalf of the user. No authentication is required to exploit this vulnerability. The vendor has not released a patch as of the advisory publication date.

Affected products

SourceCodester Class and Exam Timetabling System 1.0

Timeline

2026-07-06: disclosed: Vulnerability reported on GitHub
2026-08-23: advisory: NVD entry published for CVE-2026-78054

References

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