CVE-2025-4529 is a path traversal vulnerability identified in the Seeyon Zhiyuan OA Web Application System version 8.1 SP2. The vulnerability resides in the Download function within the ZIP File Handler component, specifically in the handling of the 'Name' argument in the file seeyon\opt\Seeyon\A8\ApacheJetspeed\webapps\seeyon\WEB-INF\lib\seeyon-apps-m3.jar!\com\seeyon\apps\m3\core\controller\M3CoreController.class. Path traversal vulnerabilities allow an attacker to manipulate file path inputs to access files and directories outside the intended scope, potentially exposing sensitive files or enabling unauthorized file operations. This vulnerability can be exploited remotely without requiring user interaction or elevated privileges, as indicated by the CVSS vector (AV:N/AC:L/PR:L/UI:N). The CVSS 4.0 base score is 5.3, categorizing it as medium severity. Although no known exploits are currently observed in the wild, the exploit code has been publicly disclosed, increasing the risk of exploitation. The vulnerability impacts confidentiality primarily, as unauthorized file access could lead to data leakage. The integrity and availability impacts are low or none based on available information. The vulnerability does not require user interaction and has low attack complexity, but it does require some level of privileges (PR:L), suggesting that an attacker must have limited access to the system to exploit it. The affected product, Seeyon Zhiyuan OA, is an office automation system used primarily in enterprise environments for workflow and document management, making it a valuable target for attackers seeking sensitive corporate information or internal documents.

For European organizations using Seeyon Zhiyuan OA 8.1 SP2, this vulnerability poses a moderate risk. Successful exploitation could allow attackers to access sensitive internal files, including configuration files, user data, or intellectual property, leading to confidentiality breaches. This could result in data leaks, regulatory non-compliance (e.g., GDPR violations), reputational damage, and potential financial penalties. Since the vulnerability can be exploited remotely and does not require user interaction, attackers could automate attacks against exposed systems. However, the requirement for some privilege level limits exploitation to insiders or attackers who have already gained limited access. The impact on integrity and availability is minimal, so attacks are unlikely to disrupt business operations directly but could facilitate further lateral movement or espionage within the network. European organizations in sectors such as government, finance, and critical infrastructure that rely on Seeyon Zhiyuan OA for document and workflow management are particularly at risk, as these sectors handle sensitive data and are frequent targets of cyber espionage and advanced persistent threats.

1. Immediate patching: Organizations should check for official patches or updates from Seeyon addressing CVE-2025-4529 and apply them promptly. 2. Access control hardening: Restrict access to the vulnerable Download function and related components to only trusted and authenticated users with necessary privileges. 3. Network segmentation: Isolate the Seeyon Zhiyuan OA system from public-facing networks and limit access to internal trusted networks to reduce exposure. 4. Input validation: Implement additional input validation and sanitization at the web application firewall (WAF) or reverse proxy level to detect and block path traversal attempts targeting the 'Name' parameter. 5. Monitoring and logging: Enable detailed logging of file access and download requests, and monitor for suspicious patterns indicative of path traversal exploitation attempts. 6. Privilege management: Review and minimize user privileges on the OA system to reduce the risk that a low-privilege user can exploit this vulnerability. 7. Incident response readiness: Prepare to respond to potential exploitation attempts by having forensic and remediation procedures in place. 8. Vendor engagement: Engage with Seeyon support for guidance and to obtain any interim mitigations if patches are not yet available.