Overview
The CVE-2025-47885 vulnerability is a severe security flaw affecting Jenkins Health Advisor by CloudBees Plugin 374.v194b_d4f0c8c8 and all earlier versions. The vulnerability arises from a failure to correctly escape responses from the Jenkins Health Advisor server, leading to a stored cross-site scripting (XSS) vulnerability. This flaw is particularly significant because attackers who can control Jenkins Health Advisor server responses can exploit it, potentially compromising the system or causing data leakage.
Vulnerability Summary
CVE ID: CVE-2025-47885
Severity: High – CVSS Score 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage
Affected Products
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Product | Affected Versions
Jenkins Health Advisor by CloudBees Plugin | 374.v194b_d4f0c8c8 and earlier
How the Exploit Works
The vulnerability arises from a failure in the Jenkins Health Advisor by CloudBees Plugin to properly escape responses from the Jenkins Health Advisor server. As a result, an attacker who can control the responses from this server can inject malicious scripts that will be stored and executed within the user’s browser when the compromised page is viewed. This stored XSS attack can lead to various harmful scenarios, such as session hijacking, identity theft, or defacement of the web application.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This could be a malicious HTTP response from the Jenkins Health Advisor server:
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
<script>evil_script_that_steals_cookies_or_other_sensitive_data</script>In the example above, the “evil_script_that_steals_cookies_or_other_sensitive_data” would be executed whenever a user views the compromised page, leading to potential data theft or other malicious actions.
It’s worth noting that while the above example is simplified for clarity, in a real-world scenario, the attacker would likely use more sophisticated methods to hide their malicious payload and avoid detection.
How to Mitigate CVE-2025-47885
Users of the affected Jenkins Health Advisor by CloudBees Plugin are strongly advised to apply the vendor patch as soon as possible. In the absence of a patch or as a temporary mitigation, users can use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to detect and block attempts to exploit this vulnerability.