CVE-2026-15540 SourceCodester CVE debrief

Who should care

Users of SourceCodester Online Book Store System 1.0 should be aware of this LFI vulnerability and take steps to mitigate it. Operators, administrators, and security teams should review the vulnerability and implement compensating controls if necessary. They should also verify affected scope, review relevant monitoring, detection, and logs for exposed assets, and track exceptions.

Technical summary

The vulnerability is caused by improper control of filename for include/require statement in php program. Performing a manipulation of the argument page results in LFI. The affected product is SourceCodester Online Book Store System 1.0. This LFI vulnerability allows attackers to include arbitrary files, potentially leading to code execution or information disclosure. The vulnerability has a CVSS score of 2.1 and is considered low-severity.

Defensive priority

Low priority, but recommended to address due to public exploit availability.

Recommended defensive actions

• Inventory and verify affected scope
• Check for vendor remediation
• Implement compensating controls
• Monitor for exploitation attempts
• Review relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Evidence is limited. Official records indicate a low-severity LFI vulnerability. The affected element is an unknown function of the file /admin/index.php of the component Administrative Interface in SourceCodester Online Book Store System 1.0. Defenders should verify affected scope and take steps to mitigate the vulnerability. The exploit is publicly available, and defenders should review relevant monitoring, detection, and logs for exposed assets that need extra review.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.