CVE-2024-25582 is a cross-site scripting (XSS) vulnerability identified in the OX App Suite developed by Open-Xchange GmbH. The flaw exists in the savepoints module, which improperly neutralizes user input during web page generation. This improper input handling allows an attacker to inject references to malicious code that is delivered through the same domain, bypassing typical cross-origin protections. The vulnerability can be exploited if an attacker gains temporary access to a user account or successfully uses social engineering techniques to convince a user to click a crafted link that points to a malicious account. Once exploited, the attacker can execute malicious API requests on behalf of the user or extract sensitive information from the user's account, potentially compromising confidentiality and integrity. The vulnerability has a CVSS v3.1 base score of 5.4, indicating medium severity, with an attack vector of network, low attack complexity, requiring privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The vendor has mitigated the issue by restricting the savepoint module path to only valid modules that provide the feature, preventing arbitrary or non-existing modules from being referenced. No public exploits have been reported, but the risk remains significant for organizations relying on OX App Suite for email and collaboration services.

For European organizations, the impact of CVE-2024-25582 can be significant, especially for those using OX App Suite as a core collaboration and communication platform. Exploitation could lead to unauthorized access to sensitive user data, including emails, contacts, and calendar information, potentially resulting in data breaches and privacy violations under GDPR. Attackers could also perform unauthorized API actions, leading to further compromise or lateral movement within the organization's infrastructure. The requirement for temporary account access or social engineering reduces the likelihood of widespread automated exploitation but increases the risk of targeted attacks against high-value users or administrators. This vulnerability could undermine trust in the affected services and cause operational disruptions if exploited. Given the medium severity and the nature of the vulnerability, organizations face moderate risk that can escalate if combined with other attack vectors or if exploited in high-profile environments.

European organizations should immediately apply the patches and updates provided by Open-Xchange GmbH that restrict the savepoint module path to valid modules only. Beyond patching, organizations should implement strict access controls and monitor for unusual API activity that could indicate exploitation attempts. User education is critical to reduce the risk of social engineering attacks; users should be trained to recognize suspicious links and avoid clicking on unexpected URLs, especially those that could lead to malicious accounts. Implementing multi-factor authentication (MFA) can reduce the risk of attackers gaining temporary account access. Security teams should also conduct regular audits of user permissions and review logs for anomalous behavior related to the OX App Suite. Deploying web application firewalls (WAFs) with rules to detect and block XSS payloads targeting the savepoints module can provide an additional layer of defense. Finally, organizations should maintain an incident response plan tailored to web application compromises to quickly contain and remediate any exploitation.