CVE-2025-45326 is a medium severity vulnerability affecting the PocketVJ CP PocketVJ-CP-v3 software, specifically version 3.9.1. The vulnerability resides in the submit_size.php component, which allows remote attackers to execute arbitrary code on the affected system. The underlying weakness is classified under CWE-77, which corresponds to Improper Neutralization of Special Elements used in a Command ('Command Injection'). This means that the submit_size.php script does not properly sanitize or validate user-supplied input before incorporating it into system commands or shell executions, enabling attackers to inject and execute malicious commands remotely without authentication or user interaction. The CVSS v3.1 base score is 6.5, reflecting a medium severity level, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), and limited confidentiality and integrity impact (C:L/I:L), with no impact on availability (A:N). No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability was reserved in April 2025 and published in September 2025. Given the nature of the vulnerability, attackers could leverage this flaw to execute arbitrary commands remotely, potentially leading to unauthorized access, data leakage, or further compromise of the affected system, depending on the privileges of the web server process running the vulnerable script.

For European organizations using PocketVJ CP PocketVJ-CP-v3 version 3.9.1, this vulnerability poses a significant risk. The ability for remote attackers to execute arbitrary code without authentication or user interaction can lead to unauthorized access to sensitive data, manipulation of system files, or pivoting to other internal systems. The confidentiality and integrity of data could be compromised, especially if the affected systems handle personal data or critical business information. Although availability impact is not indicated, attackers could potentially use this vulnerability as a foothold for further attacks, including deploying malware or ransomware. Organizations in sectors such as media, entertainment, or any industry relying on PocketVJ software for video or content management are particularly at risk. The lack of patches increases the urgency for organizations to implement compensating controls to reduce exposure. Additionally, compliance with European data protection regulations (e.g., GDPR) could be jeopardized if this vulnerability leads to data breaches.

Given the absence of an official patch, European organizations should take immediate steps to mitigate the risk. First, restrict external access to the submit_size.php component by implementing network-level controls such as firewalls or web application firewalls (WAFs) with rules to detect and block command injection patterns. Employ input validation and sanitization proxies or reverse proxies that can filter malicious payloads targeting this endpoint. Monitor web server logs for unusual or suspicious requests to submit_size.php, focusing on command injection signatures or anomalous parameter values. If feasible, disable or remove the submit_size.php component temporarily until a patch is available. Conduct thorough code reviews and implement application-layer security controls to prevent injection vulnerabilities. Additionally, ensure that the web server and application run with the least privileges necessary to limit the impact of any successful exploitation. Regularly update threat intelligence feeds and vendor advisories for any forthcoming patches or exploit reports. Finally, prepare incident response plans to quickly address any exploitation attempts.