CVE-2026-78054 SourceCodester Class and Exam Timetabling System BSIS1.php cross site scripting
Remote attackers can inject malicious scripts via the course argument in BSIS1.php, potentially compromising user sessions or executing code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-78054?
CVE-2026-78054 is a medium-severity cross-site scripting vulnerability in SourceCodester Class and Exam Timetabling System, published on 23 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A weakness has been identified in SourceCodester Class and Exam Timetabling System 1.0. Affected is an unknown function of the file /BSIS1.php. Executing a manipulation of the argument course can lead to cross site scripting. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.
Which versions are affected by CVE-2026-78054?
How do I fix CVE-2026-78054?
No fix has been published for CVE-2026-78054 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-78054 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78054 exists.
Sources
Also known as GHSA-8pvf-9972-wcx5.