Is CVE-2026-16156 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-16156 being exploited in the wild.

How severe is CVE-2026-16156?

Low severity, with a CVSS score of 3.5, published 18 July 2026.

Is there a fix for CVE-2026-16156?

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-2026-16156 attacked?

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

Am I affected by CVE-2026-16156?

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-2026-16156: SourceCodester Class and Exam Timetabling System XSS in forexam.php

CVE-2026-16156 · Severity: low · CVSS 3.5 · Published 2026-07-18

A security vulnerability exists in the SourceCodester Class and Exam Timetabling System, a web application used for managing academic schedules. An attacker can inject malicious scripts into the system that execute when other users view specific pages. This could lead to unauthorized actions being performed on behalf of users, the theft of login session information, or the defacement of the scheduling interface.

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

Quick answers

Is CVE-2026-16156 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-16156 being exploited in the wild.
How severe is CVE-2026-16156?: Low severity, with a CVSS score of 3.5, published 18 July 2026.
Which products and versions are affected?: SourceCodester Class and Exam Timetabling System 1.0.
Is there a fix for CVE-2026-16156?: 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-2026-16156 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-16156?: 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 /forexam.php file. The root cause is the improper neutralization of user-provided input in the 'day' parameter before it is rendered in the web page. A remote attacker can exploit this by tricking a user into clicking a specially crafted link or by submitting a malicious payload that executes arbitrary JavaScript in the context of the victim's browser session. This can result in the theft of session cookies or unauthorized actions. While some reports suggest low privileges are required, the vulnerability may be exploitable without authentication depending on the deployment configuration. A public exploit (PoC) has been released.

Affected products

SourceCodester Class and Exam Timetabling System 1.0

Timeline

2026-06-12: disclosed: Vulnerability reported on GitHub by zzb1388
2026-07-18: advisory: NVD/VulDB advisory published

References

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