CVE-2025-11135 is a medium-severity remote code execution vulnerability found in the pmTicket Project-Management-Software, specifically affecting the loadLanguage function within the classes/class.database.php file, part of the Cookie Handler component. The vulnerability arises from unsafe deserialization triggered by manipulation of the user_id argument. Deserialization vulnerabilities occur when untrusted data is processed by a program expecting serialized objects, potentially allowing attackers to execute arbitrary code, escalate privileges, or cause denial of service. This vulnerability can be exploited remotely without authentication or user interaction, increasing its risk profile. The product uses continuous delivery with rolling releases, complicating identification of specific affected versions or patched releases. The vendor has not responded to early disclosure attempts, and no official patches or mitigations have been published. The CVSS 4.0 score is 6.9 (medium), reflecting network attack vector, low complexity, no privileges or user interaction required, and limited impact on confidentiality, integrity, and availability. Although no known exploits are publicly reported in the wild yet, the exploit code is available, increasing the likelihood of exploitation attempts. The vulnerability affects a widely used project management software component that may be deployed in various organizational environments, making it a relevant threat to enterprises relying on pmTicket for collaboration and project tracking.

For European organizations, exploitation of this vulnerability could lead to unauthorized remote code execution on servers running pmTicket software, potentially compromising sensitive project management data, internal communications, and intellectual property. Attackers could leverage this to move laterally within networks, disrupt project workflows, or exfiltrate confidential information. Given the lack of vendor response and patches, organizations face increased risk exposure. The impact is particularly significant for sectors heavily reliant on project management tools, such as IT services, engineering, and consulting firms. Additionally, compromised systems could be used as footholds for broader attacks, affecting business continuity and regulatory compliance (e.g., GDPR) due to potential data breaches. The medium severity score suggests moderate but non-negligible risk, warranting prompt attention to prevent escalation or chained attacks.

Organizations should immediately audit their environments to identify any deployments of pmTicket Project-Management-Software. In absence of official patches, mitigations include: 1) Implementing strict input validation and sanitization on the user_id parameter at network perimeter or application firewall level to block malicious payloads attempting deserialization attacks. 2) Employing web application firewalls (WAFs) with custom rules to detect and block suspicious serialized data patterns targeting the loadLanguage function. 3) Isolating pmTicket instances in segmented network zones with limited access to critical infrastructure to contain potential breaches. 4) Monitoring logs and network traffic for anomalous activities indicative of exploitation attempts, such as unexpected deserialization payloads or unusual process executions. 5) Considering temporary suspension or replacement of pmTicket with alternative project management solutions until a vendor patch or official fix is available. 6) Engaging in threat intelligence sharing with industry peers to stay updated on emerging exploits and mitigation strategies. 7) Preparing incident response plans specific to this vulnerability to enable rapid containment and remediation if exploitation occurs.