CVE-2025-11345 is a deserialization vulnerability identified in the Test Import component of the ILIAS e-learning platform, affecting versions up to 8.23, 9.13, and 10.1. The vulnerability arises from improper handling of serialized data via the PHP unserialize function, which can be manipulated remotely by an attacker. Deserialization flaws can allow attackers to inject malicious payloads that, when unserialized, may lead to arbitrary code execution, data tampering, or denial of service. This vulnerability does not require authentication but does require some form of user interaction, such as triggering the import functionality with crafted input. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), user interaction required (UI:P), and impacts on confidentiality, integrity, and availability are low but present. The scope is unchanged, meaning the vulnerability affects only the vulnerable component. No known exploits have been reported in the wild yet, but the potential for exploitation exists given the nature of deserialization flaws. The recommended mitigation is upgrading to patched versions 8.24, 9.14, or 10.2, which have addressed the flaw. The vulnerability is significant for organizations relying on ILIAS for online education and training, as exploitation could compromise the platform’s security and user data.

The vulnerability could allow remote attackers to execute arbitrary code or manipulate data by exploiting the deserialization flaw in the Test Import component. This can lead to unauthorized access, data breaches, or service disruption, impacting confidentiality, integrity, and availability of the e-learning platform. Educational institutions and enterprises using ILIAS may face operational disruptions, reputational damage, and potential compliance issues if exploited. Although the CVSS score is medium, the ease of remote exploitation without privileges increases risk. The requirement for user interaction somewhat limits automated widespread exploitation but targeted attacks remain feasible. The absence of known exploits in the wild currently reduces immediate risk, but the vulnerability should be treated proactively to prevent future attacks.

1. Upgrade ILIAS installations to versions 8.24, 9.14, or 10.2 immediately to apply the official patch addressing this vulnerability. 2. Restrict access to the Test Import functionality to trusted users only, using network segmentation or access control lists to limit exposure. 3. Implement input validation and sanitization on serialized data inputs where possible to reduce risk of malicious payloads. 4. Monitor application logs for unusual deserialization activity or errors related to the Test Import component. 5. Employ web application firewalls (WAFs) with rules targeting deserialization attack patterns to provide an additional layer of defense. 6. Educate users about the risks of interacting with untrusted import files or data sources. 7. Regularly audit and review third-party components and plugins integrated with ILIAS for similar vulnerabilities. 8. Maintain an incident response plan to quickly address any suspected exploitation attempts.