# CVE-2026-16486 — SourceCodester Class and Exam Timetabling System

> As of 2026-07-22, CVE-2026-16486 is a MEDIUM-severity vulnerability in SourceCodester Class and Exam Timetabling System, CVSS v3.1 4.3, EPSS 0.2% (19.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-16486 as of 2026-07-22; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-22

## What is CVE-2026-16486?

A vulnerability was found in SourceCodester Class and Exam Timetabling System 1.0. This affects an unknown part of the file /BSIS.php. Performing a manipulation of the argument day results in cross site scripting. The attack may be initiated remotely. The exploit has been made public and could be used.

The record classifies CVE-2026-16486 under weakness classes [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79), [CWE-94](https://intel.threadlinqs.com/cwe/CWE-94). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 76 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R`)
- **CVSS v4.0 base score:** 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 19.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-21, last modified 2026-07-22

## Is CVE-2026-16486 being exploited?

It currently carries a trending score of 34 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [SourceCodester](https://intel.threadlinqs.com/vendors/sourcecodester): Class and Exam Timetabling System

## How to fix CVE-2026-16486

No vendor patch reference has been recorded for CVE-2026-16486 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-16486

No threat campaign in the Threadlinqs corpus currently references CVE-2026-16486, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-07-23.

**Exploit and proof of concept**

- [github.com — exploit](https://github.com/kurshidheba852-hub/My-cve-repository/issues/1)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/380944)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/380944/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-16486)
- [vuldb.com — third party advisory (859907)](https://vuldb.com/submit/859907)

**Issue tracking and product pages**

- [sourcecodester.com — product](https://www.sourcecodester.com/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-16486
Full detection coverage and IOCs for threats exploiting CVE-2026-16486 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp