CVE-2023-7314VulnerabilityPublished 30 Oct 2025Updated 17 Nov 2025

CVE-2023-7314: Nagios XI · XSS or 'Cross-site Scripting'

Affects Nagios XISource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

5.1Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: Low
Subsequent system integrity: Low
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Subsequent System.
Subsequent system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Subsequent System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 30 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Nagios XI	Affected =0	Fixed in–

AI-suggested

1. Upgrade Nagios XI to version 5.11.3 or later as soon as possible, as this version addresses the XSS vulnerability in the Bandwidth Report component. 2. If immediate upgrade is not feasible, implement strict input validation and output encoding on all user-supplied data within the Bandwidth Report and other web interface components to prevent script injection. 3. Restrict access to the Nagios XI web interface by network segmentation and firewall rules, limiting exposure to trusted networks and users only. 4. Employ web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting Nagios XI. 5. Educate users and administrators about the risks of phishing and social engineering attacks that could trigger this vulnerability. 6. Monitor logs and network traffic for unusual activity or attempts to exploit XSS vulnerabilities. 7. Regularly review and update security policies related to web application usage and patch management to ensure timely remediation of vulnerabilities. 8. Consider implementing Content Security Policy (CSP) headers to reduce the impact of potential XSS attacks by restricting script execution sources.

Description

CVE-2023-7314 is a medium-severity cross-site scripting (XSS) vulnerability affecting Nagios XI versions prior to 5.11.3, specifically in the Bandwidth Report component. The flaw arises from improper neutralization of user input, allowing attackers to inject malicious scripts that execute in the context of a victim's browser. Exploitation requires low privileges and user interaction but no authentication, making it moderately accessible. While no known exploits are currently reported in the wild, successful attacks could lead to session hijacking, credential theft, or unauthorized actions performed by the victim. European organizations using vulnerable Nagios XI versions for network monitoring could face targeted attacks, especially those in critical infrastructure or large enterprises. Mitigation involves promptly upgrading to Nagios XI 5.11.3 or later and implementing strict input validation and output encoding on affected components.

Impact

For European organizations, the impact of CVE-2023-7314 can be significant, especially for those relying on Nagios XI for critical network and infrastructure monitoring. Successful exploitation could allow attackers to execute arbitrary scripts in the browsers of administrators or users accessing the Bandwidth Report, potentially leading to session hijacking, theft of credentials, or unauthorized actions within the monitoring platform. This could result in loss of control over monitoring data, manipulation of alerts, or further lateral movement within the network. Organizations in sectors such as finance, energy, telecommunications, and government are particularly at risk due to their reliance on continuous and accurate monitoring. The medium severity suggests that while the vulnerability is not directly destructive, it can be a stepping stone for more advanced attacks if combined with other vulnerabilities or social engineering. Additionally, the requirement for user interaction means phishing or social engineering campaigns could be used to trigger the exploit. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after public disclosure. European entities with exposed Nagios XI web interfaces should consider this vulnerability a priority for remediation to maintain operational security and compliance with data protection regulations.

Summary

CVE-2023-7314 is a cross-site scripting (XSS) vulnerability identified in Nagios XI, a widely used IT infrastructure monitoring solution. The vulnerability specifically affects the Bandwidth Report component in versions prior to 5.11.3. It stems from improper neutralization of user-supplied input during web page generation (CWE-79), where insufficient validation or escaping allows malicious scripts to be injected and executed in the context of a victim’s browser. The CVSS 4.0 score of 5.1 reflects a medium severity, with an attack vector of network (remote), low attack complexity, no privileges required, but user interaction needed. The vulnerability does not impact confidentiality, integrity, or availability directly but can be leveraged for session hijacking, phishing, or other client-side attacks once the malicious script executes. No known exploits are currently reported in the wild, but the presence of this flaw in a critical monitoring tool increases the risk profile. The vulnerability’s scope is limited to the web interface of Nagios XI, and exploitation requires a victim to interact with a crafted link or page. The lack of authentication requirement lowers the barrier for attackers to attempt exploitation, especially in environments where Nagios XI is exposed to untrusted networks. This vulnerability highlights the importance of secure coding practices in web applications, particularly those used in enterprise monitoring.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Nov 2025, 18:36 UTC

WeaknessesCWE-79

Technical details

References

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