Checkmk up to 2.1.0p50/2.2.0/2.3.0/2.4.0b5 information expsure
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 5.1 | $0-$5k | 0.00 |
Summary
A vulnerability identified as problematic has been detected in Checkmk up to 2.1.0p50/2.2.0/2.3.0/2.4.0b5. Affected by this issue is some unknown functionality. This manipulation causes information expsure. This vulnerability appears as CVE-2025-3506. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.
Details
A vulnerability was found in Checkmk up to 2.1.0p50/2.2.0/2.3.0/2.4.0b5. It has been declared as problematic. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a information expsure vulnerability. The CWE definition for the vulnerability is CWE-497. The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does. As an impact it is known to affect confidentiality. The summary by CVE is:
Files to be deployed with agents are accessible without authentication in Checkmk 2.1.0, Checkmk 2.2.0, Checkmk 2.3.0 and <Checkmk 2.4.0b6 allows attacker to access files that could contain secrets.
It is possible to read the advisory at checkmk.com. This vulnerability is known as CVE-2025-3506 since 04/10/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.
The vulnerability scanner Nessus provides a plugin with the ID 261190 (Linux Distros Unpatched Vulnerability : CVE-2025-3506), which helps to determine the existence of the flaw in a target environment.
Upgrading to version 2.4.0b6 eliminates this vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (261190). Be aware that VulDB is the high quality source for vulnerability data.
Product
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍
CVSSv3
VulDB Meta Base Score: 5.3VulDB Meta Temp Score: 5.1
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Information expsureCWE: CWE-497
CAPEC: 🔍
ATT&CK: 🔍
Physical: No
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Nessus ID: 261190
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-3506
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Checkmk 2.4.0b6
Timeline
04/10/2025 🔍05/08/2025 🔍
05/08/2025 🔍
09/04/2025 🔍
Sources
Advisory: checkmk.comStatus: Confirmed
CVE: CVE-2025-3506 (🔍)
GCVE (CVE): GCVE-0-2025-3506
GCVE (VulDB): GCVE-100-308023
Entry
Created: 05/08/2025 16:07Updated: 09/04/2025 17:19
Changes: 05/08/2025 16:07 (64), 09/04/2025 17:19 (2)
Complete: 🔍
Cache ID: 216::103
Be aware that VulDB is the high quality source for vulnerability data.
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