CVE-2025-40662 is an absolute path disclosure vulnerability identified in the DM Corporative CMS developed by Dmacroweb. This vulnerability arises when an attacker attempts to access a non-existent file on the web server, causing the application to reveal the absolute path of the webroot or other directories. Absolute path disclosure is classified under CWE-200, which involves the exposure of sensitive information to unauthorized actors. In this case, the sensitive information is the directory structure of the web server hosting the CMS. The vulnerability does not require any authentication or user interaction and can be exploited remotely over the network (AV:N). The attack complexity is low (AC:L), meaning it can be easily exploited by an attacker without specialized conditions. The CVSS 4.0 base score is 6.9, indicating a medium severity level. The vulnerability does not impact confidentiality, integrity, or availability directly but leaks information that could facilitate further attacks such as directory traversal, file inclusion, or targeted exploitation of other vulnerabilities. No known exploits are currently reported in the wild, and no patches have been published yet. The affected version is listed as "0," which likely indicates an initial or early version of the CMS. The vulnerability is significant because knowledge of absolute paths can aid attackers in crafting more precise attacks, including local file inclusion or remote code execution if other vulnerabilities exist. Since the CMS is web-facing, this information disclosure can be leveraged without any privileges or user interaction, increasing the risk profile for organizations using this software.

For European organizations using DM Corporative CMS, this vulnerability poses a moderate risk primarily through information disclosure. Revealing the absolute path of the webroot can assist attackers in mapping the server environment, which is a critical step in planning more damaging attacks such as privilege escalation, code injection, or lateral movement within the network. While the vulnerability itself does not allow direct data theft or system compromise, it lowers the barrier for attackers to exploit other weaknesses. Organizations in sectors with high regulatory requirements for data protection, such as finance, healthcare, or government, may face increased risk if this information is combined with other vulnerabilities. Additionally, the exposure of internal directory structures could violate compliance mandates related to information security and data minimization. The lack of authentication or user interaction requirements means that attackers can probe systems remotely and anonymously, increasing the likelihood of reconnaissance activities. Given the medium severity and the absence of known exploits, the immediate impact may be limited, but the vulnerability should be addressed promptly to prevent escalation. European organizations with public-facing web infrastructure using this CMS are particularly vulnerable to automated scanning and exploitation attempts.

Since no official patches are currently available, European organizations should implement the following specific mitigations: 1) Configure the web server and CMS to disable detailed error messages and directory listings, ensuring that requests for non-existent files return generic error pages without revealing path information. 2) Employ web application firewalls (WAFs) with rules designed to detect and block attempts to access non-existent files or unusual URL patterns that could trigger path disclosure. 3) Conduct thorough code reviews and harden the CMS by sanitizing error handling routines to prevent leakage of filesystem paths. 4) Restrict access to the CMS administration and backend interfaces by IP whitelisting or VPN access to reduce exposure. 5) Monitor web server logs for repeated 404 errors or suspicious requests that may indicate reconnaissance attempts exploiting this vulnerability. 6) If feasible, isolate the CMS environment within segmented network zones to limit potential lateral movement. 7) Engage with the vendor (Dmacroweb) to obtain updates or patches and apply them promptly once available. 8) Educate security teams to recognize the signs of information disclosure exploitation and incorporate this vulnerability into risk assessments and penetration testing scopes.