Vulnerability · Published Jul 18, 2026 · Assigned by VulDB

CVE-2026-16155SourceCodester Class and Exam Timetabling System schoolyr.php cross site scripting

Low 3.5

In plain English

A low-severity cross-site scripting in Class and Exam Timetabling System from SourceCodester. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)3.5Low

Exploit odds (30 days)0.3%top 71.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
SourceCodester	Class and Exam Timetabling System	1.0

Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R

References

VDB-379920 | SourceCodester Class and Exam Timetabling System schoolyr.php cross site scripting vdb-entry, technical-description
VDB-379920 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-16155 | CVE Analysis and Report third-party-advisory
Submit #857080 | sourcecodester Class and Exam Timetabling System V1.0 cross site scripting third-party-advisory
https://github.com/justconter/cve/issues/4 exploit, issue-tracking
https://www.sourcecodester.com/ product