Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
SourceCodester Class and Exam Timetabling System schoolyr.php cross site scripting
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N L P N L N 2.0 .0020 10.0 —
AFFECTED
Product Versions Fixed
Class and Exam Timetabling System 1.0 – —
TIMELINE
Jul 17 Reserved by VulDB
Jul 18 EXPLOIT PUBLISHED — CVE-2026-16155 (SourceCodester Class and Exam Timetabling System). Public exploit reference added.
Jul 18 Published (CNA: VulDB)
Jul 21 RESCORED — CVE-2026-16155 (SourceCodester Class and Exam Timetabling System). CVSS 5.1 → 2 (NVD).
Description
A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0. Affected by this issue is some unknown functionality of the file /schoolyr.php. The manipulation of the argument sy leads to cross site scripting. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| July 17, 2026 | Reserved | Reserved by VulDB |
| July 18, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-16155 (SourceCodester Class and Exam Timetabling System). Public exploit reference added. |
| July 18, 2026 | Published | Published (CNA: VulDB) |
| July 21, 2026 | RESCORED | RESCORED — CVE-2026-16155 (SourceCodester Class and Exam Timetabling System). CVSS 5.1 → 2 (NVD). |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| SourceCodester | Class and Exam Timetabling System | — | 1.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-16155 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.