Overview
CVE-2025-13209 is a medium severity vulnerability identified in bestfeng oa_git_free up to version 9.5. This vulnerability is classified as an XML External Entity (XXE) injection flaw and resides within the updateWriteBack function of the WorkflowPredefineController.java file. A remote attacker can exploit this weakness by manipulating the writeProp argument, potentially leading to information disclosure or other malicious activities.
The vulnerability has been publicly disclosed and an exploit is available, making it critical to address this issue promptly.
Technical Details
The vulnerability is located in yimioa-oa9.5\server\c-flow\src\main\java\com\cloudweb\oa\controller\WorkflowPredefineController.java, specifically within the updateWriteBack function. This function appears to process XML data without proper sanitization or validation. By crafting a malicious XML payload containing an external entity reference, an attacker can force the application to access arbitrary files on the server or interact with external systems.
The lack of input validation on the writeProp argument allows for the injection of malicious XML code, resulting in the XXE vulnerability.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) score for CVE-2025-13209 is 6.3 (Medium). This score reflects the potential impact and exploitability of the vulnerability. The CVSS vector typically considers factors such as attack vector, attack complexity, privileges required, user interaction, scope, confidentiality impact, integrity impact, and availability impact. While specific details of the vector are not provided in the prompt, the score indicates that remote exploitation is possible and could lead to moderate data exposure or system disruption.
Possible Impact
Successful exploitation of CVE-2025-13209 could have significant consequences:
- Information Disclosure: An attacker could potentially read sensitive files from the server’s file system.
- Denial of Service (DoS): By referencing external entities that cause resource exhaustion, an attacker could potentially disrupt the availability of the application.
- Server-Side Request Forgery (SSRF): The attacker could use the vulnerable application as a proxy to make requests to internal or external systems, potentially accessing restricted resources or initiating malicious actions.
Mitigation or Patch Steps
To mitigate the risk posed by CVE-2025-13209, the following steps are recommended:
- Upgrade to a patched version: The most effective solution is to upgrade to a version of bestfeng oa_git_free where this vulnerability has been addressed. Contact the vendor for information on available patches or updates.
- Input Validation: Implement robust input validation on the
writePropargument in theupdateWriteBackfunction. Sanitize and validate all XML data to prevent the injection of malicious code. - Disable External Entities: Configure the XML parser to disable the processing of external entities. This can significantly reduce the risk of XXE attacks.
- Web Application Firewall (WAF): Deploy a Web Application Firewall (WAF) to detect and block malicious XML payloads attempting to exploit the vulnerability.
