CVE-2026-5131: CWE-918 Server-Side Request Forgery (SSRF) in Nomios Poland GREENmod
CVE-2026-5131 is a Server-Side Request Forgery (SSRF) vulnerability in Nomios Poland's GREENmod product. The issue arises from incorrectly configured access control lists on named pipes used for communication between plugins, the web portal, and the system service. This misconfiguration allows an attacker to upload arbitrary XML or JSON files to the named pipe, which are then processed with the privileges of the service user. Exploitation enables SSRF to any Windows system running the vulnerable agent that supports SMB or WebDav communication. The vulnerability has a CVSS 4. 0 base score of 6. 9 (medium severity). It was fixed in version 2. 8. 33 of GREENmod.
AI Analysis
Technical Summary
GREENmod uses named pipes for inter-component communication, but the access control lists on these pipes are improperly set, permitting unauthorized communication. An attacker can upload XML or JSON files to the named pipe, which the system processes with the service's user privileges. This leads to Server-Side Request Forgery (CWE-918) attacks targeting Windows systems where the agent is installed and exposes SMB or WebDav services. The vulnerability was addressed in version 2.8.33.
Potential Impact
An attacker can leverage this vulnerability to perform SSRF attacks on Windows systems running the vulnerable GREENmod agent, potentially accessing internal network resources via SMB or WebDav protocols with the privileges of the service user. This could lead to unauthorized access or actions within the affected system's network environment. No known exploits in the wild have been reported.
Mitigation Recommendations
This vulnerability is fixed in GREENmod version 2.8.33. Users should upgrade to this version or later to remediate the issue. Since the vendor advisory does not provide additional remediation details, patching to the fixed version is the recommended action. Patch status is confirmed by the vendor stating the fix is included in version 2.8.33.
CVE-2026-5131: CWE-918 Server-Side Request Forgery (SSRF) in Nomios Poland GREENmod
Description
CVE-2026-5131 is a Server-Side Request Forgery (SSRF) vulnerability in Nomios Poland's GREENmod product. The issue arises from incorrectly configured access control lists on named pipes used for communication between plugins, the web portal, and the system service. This misconfiguration allows an attacker to upload arbitrary XML or JSON files to the named pipe, which are then processed with the privileges of the service user. Exploitation enables SSRF to any Windows system running the vulnerable agent that supports SMB or WebDav communication. The vulnerability has a CVSS 4. 0 base score of 6. 9 (medium severity). It was fixed in version 2. 8. 33 of GREENmod.
CVSS v4.0
Score 6.9medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
GREENmod uses named pipes for inter-component communication, but the access control lists on these pipes are improperly set, permitting unauthorized communication. An attacker can upload XML or JSON files to the named pipe, which the system processes with the service's user privileges. This leads to Server-Side Request Forgery (CWE-918) attacks targeting Windows systems where the agent is installed and exposes SMB or WebDav services. The vulnerability was addressed in version 2.8.33.
Potential Impact
An attacker can leverage this vulnerability to perform SSRF attacks on Windows systems running the vulnerable GREENmod agent, potentially accessing internal network resources via SMB or WebDav protocols with the privileges of the service user. This could lead to unauthorized access or actions within the affected system's network environment. No known exploits in the wild have been reported.
Mitigation Recommendations
This vulnerability is fixed in GREENmod version 2.8.33. Users should upgrade to this version or later to remediate the issue. Since the vendor advisory does not provide additional remediation details, patching to the fixed version is the recommended action. Patch status is confirmed by the vendor stating the fix is included in version 2.8.33.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERT-PL
- Date Reserved
- 2026-03-30T09:39:43.884Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e216a682d89c981fce584a
Added to database: 4/17/2026, 11:16:54 AM
Last enriched: 4/24/2026, 4:21:56 PM
Last updated: 6/2/2026, 4:25:43 AM
Views: 56
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