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