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CVE-2026-28097: High Vulnerability in ThemeREX Artrium

CVE-2026-28097 is a high-severity vulnerability affecting ThemeREX Artrium, allowing local file inclusion through improper control of file names. Immediate remediation is necessary to mitigate risks associated with this vulnerability.

HIGHCVSS 8.1 · Published March 5, 2026

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CVE-2026-28097 is classified as a high-severity vulnerability with a CVSS score of 8.1. This vulnerability allows improper control of filename for include/require statements in PHP programs, specifically impacting ThemeREX Artrium versions up to and including 1.0.14. The exploitation of this vulnerability could lead to local file inclusion, posing a significant risk to organizations using this theme.

The urgency for defenders is high, as risk to organizations includes potential unauthorized access to sensitive files and data leakage. Organizations should prioritize patching immediately to mitigate the associated risks.

This vulnerability was publicly disclosed on March 5, 2026, and it is currently deferred, indicating that a resolution may not be immediately forthcoming. However, the high exploitability score suggests that organizations should not delay in applying necessary mitigations.

As of now, there are no known public exploits or proof of concept code available for this vulnerability. This provides a small window of opportunity for organizations to implement remediation strategies before potential exploitation occurs.

Vulnerability Details

The vulnerability in question is a result of improper control of the filename in PHP programs, allowing for local file inclusion. Specifically, it affects ThemeREX Artrium versions up to 1.0.14, where PHP scripts may include or require files that are not properly validated. The CWE classification for this vulnerability is CWE-98.

The attack vector for this vulnerability is network-based, with a high attack complexity, meaning successful exploitation requires a favorable set of conditions. Importantly, no privileges are required for an attacker to exploit this vulnerability, and user interaction is not needed.

The impacts of exploitation include high confidentiality, integrity, and availability impacts, which emphasizes the critical nature of this vulnerability.

Technical Analysis

The root cause of this vulnerability lies in the lack of proper validation for filenames in the PHP include/require statements. Attackers may leverage this lack of control to include arbitrary files on the server, leading to potential data breach or code execution.

In terms of attack vector, this vulnerability can be exploited remotely over the network. The complexity of the attack is categorized as high, indicating that it may require a sophisticated approach and specific conditions to successfully execute. Importantly, no privileges are required, and no user interaction is needed for the attack to succeed.

The confidentiality, integrity, and availability impacts are all rated as high, meaning successful exploitation could have severe consequences for affected organizations.

Risk & Impact Analysis

The real-world deployment risk associated with this vulnerability is significant, especially for organizations using the affected version of ThemeREX Artrium. If exploited, the potential for unauthorized access to sensitive information or even full server compromise is high.

Given the nature of this vulnerability and its potential impact, organizations should assess the urgency based on the CVSS score of 8.1, indicating a high severity. Organizations should prioritize remediation efforts to ensure that their systems are not vulnerable to exploitation.

With the current lack of known public exploits, there is a temporary reprieve for organizations to mitigate this vulnerability before potential exploitation becomes a reality.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

The affected version for this vulnerability is ThemeREX Artrium, specifically versions from n/a through 1.0.14. Organizations using these versions should take immediate action to secure their installations.

Mitigation & Remediation

To mitigate this vulnerability, organizations should immediately update to the latest version of ThemeREX Artrium that has addressed this issue. If an update is not feasible, consider implementing workarounds such as disabling PHP file inclusion features or using alternative themes.

Additionally, organizations should conduct a thorough review of their PHP configurations and security policies to ensure that local file inclusion vulnerabilities are not present elsewhere. Consider engaging in penetration testing to validate the security posture and identify potential weaknesses.

Detection Guidance

Organizations should monitor their logs for any indicators of local file inclusion attempts, such as suspicious file paths or unexpected file access requests. Additionally, any anomalies in application behavior, particularly related to file handling, should be investigated promptly.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2026-28097 lies in its illustration of common pitfalls in PHP application development, particularly regarding file handling. This vulnerability highlights the importance of rigorous input validation and proper security measures in code.

Security teams should treat this vulnerability as a reminder of the need for regular security assessments and patch management processes. It represents a broader trend in web application security where improper input handling can lead to severe consequences.

Organizations should prioritize the development of secure coding practices and consider adopting penetration testing methodologies to proactively identify and mitigate vulnerabilities before they can be exploited.

In conclusion, CVE-2026-28097 serves as a critical reminder of the importance of secure coding practices and the need for proactive security measures to protect against vulnerabilities that could lead to significant organizational risk.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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