TI-2026-71548 Aliases CVE-2026-108973 GHSA-wqfp-rm4r-2hj4

Unrestricted file upload in SourceCodester Contact Tracing System

HIGH 70CWE-284Published 2026-10-13 · Updated 2026-10-13

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass, Code execution
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284 and CWE-434.

Summary

SourceCodester Contact Tracing System 1.0 contains an unrestricted file upload flaw (CWE-434) in the move_uploaded_file call within /classes/Users.php?f=save. The code stores uploaded files without checking their type, which lets a remote attacker upload arbitrary files without privileges or user interaction. A public exploit has been disclosed and is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

A vulnerability was determined in SourceCodester Contact Tracing System 1.0. Affected by this issue is the function move_uploaded_file of the file /classes/Users.php?f=save. This manipulation of the argument img/id causes unrestricted upload. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00288 21st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
SourceCodester	Contact Tracing System	1.0	—	No fix listed	CNA

Contact Tracing System VendorSourceCodester Affected 1.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sourcecodester:contact_tracing_system::::::::	—	—	SourceCodester

cpe:2.3:a:sourcecodester:contact_tracing_system:*:*:*:*:*:*:*:* Versions — — ·SourceCodester

Remediation

The sources list no fixed version for SourceCodester Contact Tracing System.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

2026-10-13 Threatist record created from CVE-2026-108973
2026-10-13 Alias added: GHSA-wqfp-rm4r-2hj4
2026-10-13 CISA SSVC decision points changed
2026-10-13 Priority changed: MEDIUM → HIGH

References

Exploit 1

https://tracexlabs.com/releases/contact-tracing-preauth-rce.html

Other 1

https://www.sourcecodester.com/

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Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences