CVE-2025-7787: Server-Side Request Forgery (SSRF) in Xuxueli xxl-job
Xuxueli xxl-job, a popular distributed task scheduling framework, is affected by a critical Server-Side Request Forgery (SSRF) vulnerability. This flaw allows an attacker to force the server to make HTTP requests to arbitrary destinations, potentially leading to information disclosure, internal network scanning, or even remote code execution in certain scenarios.
Vulnerability Details
- CVE ID: CVE-2025-7787
- Description: A Server-Side Request Forgery (SSRF) vulnerability exists in the
httpJobHandlerfunction withinsrc\main\java\com\xxl\job\executor\service\jobhandler\SampleXxlJob.javaof Xuxueli xxl-job up to version 3.1.1. This allows a remote attacker with low privileges to force the server to make arbitrary HTTP requests. - CVSS Score: 6.3 (Medium)
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- CVSS v3.1 Explanation:
- Attack Vector: Network - The vulnerability can be exploited over the network.
- Attack Complexity: Low - Exploitation is straightforward and requires minimal effort.
- Privileges Required: Low - An attacker only needs low-level access to exploit the vulnerability.
- User Interaction: None - No user interaction is required for exploitation.
- Scope: Unchanged - The vulnerability only impacts the component where it exists.
- Confidentiality Impact: Low - There is limited disclosure of information.
- Integrity Impact: Low - There is limited modification of data.
- Availability Impact: Low - There is limited disruption of services.
- Exploit Requirements: Low-privileged access to the xxl-job application.
- Affected Vendor: Xuxueli
- Affected Product: xxl-job
- Affected Version: Up to 3.1.1
- CWE: CWE-918 - Server-Side Request Forgery (SSRF)
- CWE Explanation: Server-Side Request Forgery (SSRF) occurs when an application can be tricked into making requests to unintended locations, often internal servers or services. This can be exploited to read sensitive data or perform unauthorized actions.
Timeline of Events
- Reported: Unknown
- Disclosed: Publicly disclosed
- CVE Assigned: 2025-07-18
Exploitability & Real-World Risk
The vulnerability is considered easily exploitable, as demonstrated by the publicly available proof-of-concept exploit. In a real-world scenario, an attacker could leverage this SSRF to:
- Scan internal network resources that are not directly accessible from the internet.
- Access sensitive files or services hosted on internal servers (e.g., configuration files, databases).
- Potentially achieve remote code execution by targeting vulnerable internal services.
Recommendations
- Upgrade: Upgrade to a patched version of xxl-job that addresses this vulnerability. Check the official xxl-job repository or website for updates.
- Input Validation: Implement strict input validation to prevent the manipulation of URLs used in HTTP requests.
- Network Segmentation: Isolate the xxl-job application from sensitive internal resources using network segmentation and firewalls.
- Least Privilege: Ensure that the xxl-job application runs with the least privileges necessary to perform its functions.
- Monitor Outbound Traffic: Monitor outbound network traffic for suspicious activity, such as requests to unexpected internal or external destinations.
Technical Insight
The httpJobHandler function likely constructs HTTP requests based on user-supplied input without proper validation. This allows an attacker to inject arbitrary URLs, causing the server to make requests on their behalf. Due to the lack of input sanitization, the application doesn't properly validate where it is sending requests. This is the root cause of the SSRF vulnerability.
Credit to Researcher(s)
Vulnerability reported via public issue tracker.
References
Tags
#XXL-JOB #SSRF #CVE-2025-7787 #ServerSideRequestForgery #Vulnerability #Security #Exploit #RCE
Summary: A critical Server-Side Request Forgery (SSRF) vulnerability (CVE-2025-7787) exists in Xuxueli xxl-job up to version 3.1.1, allowing remote attackers with low privileges to force the server to make arbitrary HTTP requests. Upgrade immediately and implement mitigation strategies.
CVE ID: CVE-2025-7787
Risk Analysis: Successful exploitation can lead to internal network reconnaissance, access to sensitive internal resources, and potentially remote code execution if vulnerable internal services are targeted. Business impact includes data breaches, system compromise, and potential disruption of services.
Recommendation: Upgrade to a patched version of xxl-job, implement strict input validation, segment the network to isolate the xxl-job application, and monitor outbound network traffic for suspicious activity.
Timeline
- 2025-07-18: CVE ID Assigned