CVE-2025-2775 is an XML External Entity (XXE) vulnerability classified under CWE-611 affecting SysAid On-Prem versions up to 23.3.40. The vulnerability resides in the Checkin processing functionality, which processes XML input without properly restricting external entity references. This improper restriction allows an unauthenticated attacker to craft malicious XML payloads that can be submitted remotely over the network. Exploiting this flaw enables the attacker to read arbitrary files on the server and escalate privileges to take over administrator accounts. The vulnerability's CVSS 3.1 score of 9.3 reflects its critical nature: it requires no authentication (PR:N), no user interaction (UI:N), and can be exploited remotely (AV:N). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. While no public exploits have been reported yet, the potential for severe impact on confidentiality and integrity is high. The lack of patches at the time of reporting necessitates immediate defensive measures. The vulnerability could be leveraged to compromise IT service management infrastructure, leading to disruption of enterprise operations and exposure of sensitive data.

For European organizations, the impact of CVE-2025-2775 is significant due to the critical role SysAid On-Prem plays in IT service management and helpdesk operations. Successful exploitation can lead to full administrative control over the affected SysAid instance, enabling attackers to manipulate service tickets, access sensitive organizational data, and potentially pivot to other internal systems. Confidentiality is severely impacted as attackers can read arbitrary files, possibly including credentials or configuration files. Integrity is compromised through administrator account takeover, allowing unauthorized changes to system configurations and data. Availability impact is lower but still present due to potential disruption caused by unauthorized administrative actions. Organizations in sectors such as finance, healthcare, government, and critical infrastructure are particularly vulnerable due to the sensitive nature of their data and reliance on ITSM platforms. The vulnerability's unauthenticated remote exploitation capability increases the risk of widespread attacks if left unmitigated.

1. Apply vendor patches immediately once available to address the XXE vulnerability in SysAid On-Prem. 2. Until patches are released, disable or restrict XML external entity processing in the Checkin functionality if configurable. 3. Implement network-level controls such as web application firewalls (WAFs) with rules to detect and block malicious XML payloads containing external entity references. 4. Restrict access to the SysAid On-Prem management interfaces to trusted internal networks and VPNs only, minimizing exposure to untrusted sources. 5. Monitor logs for unusual XML input patterns or failed authentication attempts indicative of exploitation attempts. 6. Conduct regular security assessments and penetration tests focusing on XML processing components. 7. Educate IT staff on the risks of XXE vulnerabilities and the importance of secure XML parsing configurations. 8. Isolate critical ITSM infrastructure from other network segments to limit lateral movement in case of compromise.