Log Server: Exposure of Sensitive System Information to an Unauthorized Control Sphere
CVE-2025-44823 is a high-severity exposure of sensitive system information to an unauthorized control sphere vulnerability in Log Server from Nagios, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. The record lists version 2024R1.3.2 as the first without the flaw, so updating Log Server to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 16.9% chance of exploitation within 30 days, which is in the top 2.9% of all scored CVEs.
EPSS places it among the vulnerabilities most likely to be exploited soon.
What to do
- Update Log Server to 2024R1.3.2 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Nagios | Log Server | before 2024R1.3.2 | 2024R1.3.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.9 | Critical | CNA (mitre.org) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
Nagios Log Server before 2024R1.3.2 allows authenticated users to retrieve cleartext administrative API keys via a /nagioslogserver/index.php/api/system/get_users call. This is GL:NLS#475.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Exposure of Sensitive System Information to an Unauthorized Control Sphere
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.
How developers prevent this class of flaw
- Production applications should never use methods that generate internal details such as stack traces and error messages unless that information is directly committed to a log that is not viewable by the end user. All error message text should be HTML entity encoded before being written to the log file to protect against potential cross-site scripting attacks against the viewer of the logs
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- nagios.com/changelog/#log-serverRelease Notes
Technical write-ups (may include proof of concept)
- exploit-db.com/exploits/52177Exploit, VDB Entry
Other vulnerabilities in Log Server
- 7.8 High severity
- 7.2 High severity
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerabilities
- 7.5 High severity
- 8.6 High severity
- 7.2 High severity
- 10.0 Critical severity
- 8.8 High severity
- 7.5 High severity
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