Cyber Resilience

CVE-2026-5210

Medium

Published: 31 March 2026

Published
31 March 2026
Modified
24 April 2026
KEV Added
—
Patch
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CVSS Score v4 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0006 19.7th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-5210 is a medium-severity External Control of File Name or Path (CWE-73) vulnerability in Sourcecodester (inferred from references). Its CVSS base score is 6.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 19.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-5210 is a file inclusion vulnerability in SourceCodester Leave Application System 1.0, affecting an unknown component. The issue arises from manipulation of the "page" argument, enabling local file inclusion as classified under CWE-73 (External Control of File Name or Path). It carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), indicating high severity due to its network accessibility and low attack complexity.

Remote attackers require no privileges or user interaction to exploit this vulnerability over the network. Successful exploitation can result in low-level impacts to confidentiality, integrity, and availability, such as unauthorized access to local files or limited system disruption, depending on the target's configuration.

Advisories referenced in VulDB entries (vuln/354346) and a Medium post detail the local file inclusion flaw and provide public exploit information. The SourceCodester website is also listed among references, though specific patch or mitigation guidance is not detailed in the available descriptions.

EU & UK References

Vulnerability details

A vulnerability was detected in SourceCodester Leave Application System 1.0. This affects an unknown part. Performing a manipulation of the argument page results in file inclusion. Remote exploitation of the attack is possible. The exploit is now public and may…

more

be used.

CWE(s)
CWE-73

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
Why these techniques?

LFI in public-facing web app directly enables T1190 exploitation; allows unauthorized local file access facilitating T1005 data collection.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2026-33354Shared CWE-73
CVE-2026-8043Shared CWE-73
CVE-2026-43891Shared CWE-73
CVE-2026-29611Shared CWE-73
CVE-2026-29962Shared CWE-73
CVE-2025-53912Shared CWE-73
CVE-2026-40370Shared CWE-73
CVE-2019-25472Shared CWE-73
CVE-2025-10134Shared CWE-73
CVE-2025-65115Shared CWE-73

Affected Assets

Sourcecodester
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly remediates the specific local file inclusion flaw in the Leave Application System by identifying, prioritizing, and applying corrections or patches.

SI-10 Information Input Validation good match
prevent

Validates the manipulated 'page' argument to ensure it does not enable external control of file names or paths, preventing file inclusion exploitation.

SI-9 Information Input Restrictions good match
prevent

Restricts the 'page' parameter to whitelisted values or safe patterns, blocking path traversal sequences used in the file inclusion attack.

References