CVE-2025-13990 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Mamurjor Employee Info plugin for WordPress, affecting all versions up to 1.0.0. The vulnerability stems from the absence of nonce validation on multiple administrative endpoints, which are intended to protect against unauthorized requests. Nonces in WordPress serve as tokens to verify that requests originate from legitimate users and sessions. Without this protection, an attacker can craft malicious web requests that, when executed by an authenticated administrator (e.g., by clicking a specially crafted link), perform unauthorized actions such as creating, updating, or deleting employee records, departments, designations, salary grades, education records, and salary payments. Since these operations affect critical HR data, unauthorized modifications could lead to data integrity issues, financial discrepancies, and operational disruptions. The vulnerability does not expose confidential data directly nor does it impact system availability. Exploitation requires user interaction but no prior authentication, making social engineering a key attack vector. No patches or exploit code are currently publicly available, but the flaw is documented and assigned CVE-2025-13990 with a CVSS 3.1 base score of 4.3, reflecting a medium severity primarily due to its limited impact scope and exploitation complexity.

For European organizations, especially small and medium enterprises (SMEs) using WordPress with the Mamurjor Employee Info plugin, this vulnerability poses a risk to the integrity of sensitive employee and payroll data. Unauthorized modifications could lead to inaccurate employee records, payroll errors, and potential compliance violations under regulations such as GDPR if personal data is mishandled. While confidentiality and availability are not directly impacted, the integrity compromise can undermine trust in HR systems and cause operational disruptions. Attackers exploiting this vulnerability could manipulate salary payments or employee designations, potentially facilitating fraud or internal sabotage. The requirement for administrator interaction reduces the likelihood of widespread automated exploitation but does not eliminate risk, particularly in environments with insufficient user awareness or weak administrative controls. European organizations with decentralized or less mature IT security practices may be more vulnerable to social engineering attempts that enable exploitation.

1. Monitor for and apply security patches or updates from the Mamurjor plugin vendor as soon as they become available to address nonce validation issues. 2. Until patches are released, restrict administrative access to trusted personnel only and enforce the principle of least privilege. 3. Implement multi-factor authentication (MFA) for WordPress administrator accounts to reduce the risk of compromised credentials being exploited. 4. Educate administrators about the risks of phishing and social engineering attacks, emphasizing caution when clicking on unsolicited links or emails. 5. Use web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the plugin’s administrative endpoints. 6. Regularly audit and monitor logs for unusual administrative activities or changes to employee data. 7. Consider temporarily disabling or replacing the Mamurjor Employee Info plugin if it is not critical or if no patch is available, to eliminate exposure. 8. Employ Content Security Policy (CSP) headers to reduce the risk of CSRF and other web-based attacks. 9. Review and implement nonce validation in custom or third-party plugins as a best practice to prevent similar vulnerabilities.