CVE-2016-15054Public exploitNetwork attack vector

Client-side script execution via unanchored HTML detection

Published Nov 3, 2025 · Updated Nov 3, 2025

Cross-site scripting in Nagios XI before 5.4.0 allows remote attackers to run script in a victim's browser through crafted input. The bundled jQuery main function uses an unanchored expression to classify strings as HTML, so a less-than sign later in attacker-controlled input can create executable markup. A victim must load affected content; this identifier is rejected as a downstream duplicate of CVE-2012-6708, and the Nagios-specific injection point remains undisclosed.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Nagios XI before 5.4.0 allows remote attackers to run script in a victim's browser through crafted input. The bundled jQuery main function uses an unanchored expression to classify strings as HTML, so a less-than sign later in attacker-controlled input can create executable markup. A victim must load affected content; this identifier is rejected as a downstream duplicate of CVE-2012-6708, and the Nagios-specific injection point remains undisclosed.

The record

CVE
CVE-2016-15054
Published
Nov 3, 2025
Updated
Nov 3, 2025
Vendor
Nagios Enterprises, LLC
Product
Nagios XI
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nagios Enterprises, LLC · Nagios XIversion=0 <5.4.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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