CVE-2025-27406Network attack vector

Stored XSS via unescaped template color

Published Mar 26, 2025 · Updated Mar 26, 2025

Stored XSS in Icinga Reporting 0.10.0 through 1.0.2 allows remote authenticated users to execute JavaScript through template colors. The CoverPage widget inserted the configured color into a nonce-bearing style without HTML escaping, while TemplateForm accepted colon-bearing CSS values. Template-management privileges are required; previewing a malicious template runs code as the viewer, while PDF generation runs it in the server-side headless browser and can issue SSRF requests.

CVSS severity7.6
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Icinga Reporting 0.10.0 through 1.0.2 allows remote authenticated users to execute JavaScript through template colors. The CoverPage widget inserted the configured color into a nonce-bearing style without HTML escaping, while TemplateForm accepted colon-bearing CSS values. Template-management privileges are required; previewing a malicious template runs code as the viewer, while PDF generation runs it in the server-side headless browser and can issue SSRF requests.

The record

CVE
CVE-2025-27406
Published
Mar 26, 2025
Updated
Mar 26, 2025
Vendor
Icinga
Product
Icinga Reporting
Classifications
CWE-79, CWE-918, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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=>= 0.10.0, < 1.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Icinga · Icinga Reportingversion=>= 0.10.0, < 1.0.3

Published CVSS scores

7.6GitHubCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-918Server-Side Request Forgery (SSRF)
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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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