CVE-2026-28062 is a Local File Inclusion (LFI) vulnerability found in the ThemeREX Happy Baby WordPress theme versions up to 1.2.12. The vulnerability arises from improper control over the filename parameter used in PHP include or require statements. Specifically, the theme fails to properly validate or sanitize user-supplied input that determines which files are included by the PHP interpreter. This flaw allows an attacker to manipulate the input to include arbitrary files from the server's filesystem. Such an inclusion can lead to disclosure of sensitive files (e.g., configuration files, password files) or even execution of malicious code if the attacker can upload files to the server. The vulnerability is classified as a Local File Inclusion rather than Remote File Inclusion, meaning the attacker can only include files already present on the server, not remote files. However, LFI can be leveraged in combination with other vulnerabilities or misconfigurations to achieve remote code execution. The affected product is the Happy Baby theme by ThemeREX, a WordPress theme used primarily for baby and parenting-related websites. The vulnerability affects all versions up to and including 1.2.12. No official patches or fixes are currently linked, and no known exploits have been reported in the wild as of the publication date. The vulnerability was reserved and published in early 2026, indicating recent discovery. The lack of a CVSS score suggests the need for an independent severity assessment. The vulnerability impacts the confidentiality and integrity of affected systems by allowing unauthorized file access and potential code execution. Exploitation requires no authentication but does require the attacker to interact with the vulnerable web application by supplying crafted input parameters. The scope is limited to websites using the affected theme, but given WordPress's widespread use, the potential attack surface is significant.

The primary impact of CVE-2026-28062 is unauthorized disclosure of sensitive information through Local File Inclusion, which can expose configuration files, credentials, or other sensitive data stored on the server. Additionally, if an attacker can upload files or leverage other vulnerabilities, this LFI can escalate to remote code execution, leading to full system compromise. For organizations, this can result in data breaches, defacement of websites, loss of customer trust, and potential regulatory penalties. The vulnerability affects websites using the Happy Baby theme, which may be popular among small to medium businesses and bloggers in the parenting niche. Exploitation can disrupt website availability and integrity, impacting business operations and reputation. Since WordPress powers a significant portion of the web, and themes are a common attack vector, the risk is amplified. Organizations that do not promptly address this vulnerability may face targeted attacks, especially if threat actors develop exploit code. The absence of known exploits currently provides a window for mitigation before widespread attacks occur.

1. Immediate mitigation involves updating the Happy Baby theme to a version that addresses this vulnerability once available from ThemeREX. Monitor official channels for patches or security updates. 2. If no patch is available, temporarily disable or replace the vulnerable theme with a secure alternative to prevent exploitation. 3. Implement Web Application Firewall (WAF) rules to detect and block suspicious requests attempting to exploit file inclusion, such as those containing directory traversal sequences or unusual parameter values. 4. Harden PHP configurations by disabling dangerous functions (e.g., allow_url_include) and restricting file system permissions to limit accessible files by the web server user. 5. Conduct code reviews and apply input validation and sanitization on all parameters controlling file inclusion to ensure only intended files can be included. 6. Monitor web server logs for anomalous requests indicative of LFI attempts and respond promptly. 7. Educate site administrators about the risks of using outdated or untrusted themes and encourage regular updates and security audits. 8. Employ intrusion detection systems to identify exploitation attempts and isolate affected systems quickly. 9. Backup website data regularly to enable recovery in case of compromise. These measures collectively reduce the risk of exploitation and limit potential damage.