CVE-2025-2776 is an XML External Entity (XXE) vulnerability classified under CWE-611, found in SysAid On-Prem versions up to 23.3.40. The vulnerability exists in the Server URL processing functionality, where XML input is not properly sanitized or restricted, allowing external entity references to be processed. This flaw enables unauthenticated attackers to craft malicious XML payloads that can read arbitrary files on the server, potentially exposing sensitive configuration files, credentials, or other critical data. Furthermore, the vulnerability can be leveraged to escalate privileges by taking over administrator accounts, which could lead to full system compromise. The CVSS v3.1 score of 9.3 reflects a critical severity with network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and a scope change (S:C). The impact on confidentiality is high due to arbitrary file read, integrity impact is none, and availability impact is low. The vulnerability is unauthenticated and remotely exploitable, increasing its risk profile. Although no public exploits are currently known, the vulnerability's characteristics make it a prime target for attackers once exploit code becomes available. SysAid On-Prem is widely used in enterprise IT service management, making this vulnerability particularly concerning for organizations relying on it for internal IT operations. The lack of an official patch at the time of disclosure necessitates immediate risk mitigation steps to protect affected systems.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of IT service management environments. Successful exploitation can lead to unauthorized disclosure of sensitive files, including credentials and configuration data, which can facilitate further lateral movement within networks. Administrator account takeover can result in complete control over the SysAid platform, enabling attackers to manipulate IT workflows, disable security controls, or deploy additional malware. This can disrupt critical IT services, impacting business continuity and compliance with data protection regulations such as GDPR. The vulnerability's unauthenticated and remote exploitation nature increases the likelihood of attacks, especially in environments exposed to the internet or insufficiently segmented networks. Organizations in sectors with high reliance on ITSM platforms, such as finance, healthcare, and government, face elevated risks. Additionally, the potential for scope change means that compromise could extend beyond the SysAid application to other connected systems, amplifying the overall impact.

1. Monitor SysAid vendor communications closely for the release of an official security patch and apply it immediately upon availability. 2. Until a patch is available, restrict network access to the SysAid On-Prem server, limiting exposure to trusted internal networks only. 3. Implement strict input validation and XML parsing configurations to disable external entity processing where possible or use secure XML parsers that prevent XXE attacks. 4. Conduct thorough audits of SysAid server logs to detect anomalous XML requests or unusual file access patterns indicative of exploitation attempts. 5. Employ network-level controls such as Web Application Firewalls (WAFs) with custom rules to block malicious XML payloads targeting the Server URL processing functionality. 6. Enforce the principle of least privilege on SysAid administrator accounts and rotate credentials regularly to reduce the impact of potential account compromise. 7. Segment the SysAid infrastructure from critical systems to contain any potential breach and prevent lateral movement. 8. Educate IT staff on the nature of XXE vulnerabilities and the importance of timely patching and monitoring.