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Icinga Web 2Application · Icinga

CVE-2025-27404

MEDIUM · 6.1 CVSS v3.1 Published 2025-03-26
Fix available
A fix is available. Upgrade to 2.11.5 / 2.12.3 or later.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. A vulnerability in versions prior to 2.11.5 and 2.12.13 allows an attacker to craft a URL that, once visited by any user, allows to embed arbitrary Javascript into Icinga Web and to act on behalf of that user. This issue has been resolved in versions 2.11.5 and 2.12.3 of Icinga Web 2. As a workaround, those who have Icinga Web 2.12.2 may enable a content security policy in the application settings.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

This is a cross-site scripting (XSS) vulnerability in Icinga Web 2 that allows attackers to craft malicious URLs which, when visited by any user, inject and execute arbitrary JavaScript in the user's browser context, enabling session hijacking and actions performed on behalf of the victim user.

MitigationUpgrade Icinga Web 2 to version 2.11.5 or 2.12.3 or later; as an alternative for version 2.12.2 only, enable Content Security Policy in the application settings.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Icinga Web 2Application
Affected:< 2.11.5>= 2.12.0, < 2.12.3

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Determine installed Icinga Web 2 version
    Check the installed version using your system's package manager (for example: dpkg -l icingaweb2, rpm -qi icingaweb2, or apt list --installed icingaweb2) or access the Icinga Web 2 web interface and navigate to the About or System Information page
    Affected if Version cannot be determined from the system
  2. Compare against affected version ranges
    Compare your installed version to the vulnerable ranges: any version lower than 2.11.5, or any version from 2.12.0 up to and including 2.12.2
    Affected if Your version is less than 2.11.5 or greater than or equal to 2.12.0 but less than 2.12.3
  3. Check CSP status for version 2.12.2 only
    If running exactly version 2.12.2, verify whether Content Security Policy has been enabled in the application settings as an alternative mitigation
    Affected if Running version 2.12.2 and Content Security Policy is disabled or not configured

Your environment is affected if Icinga Web 2 is installed and the version is either below 2.11.5 or between 2.12.0 and 2.12.2 (unless CSP is enabled on 2.12.2).

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.11.5 / 2.12.3 or later
Fixed in 2.11.52.12.3
Interim mitigation

Upgrade Icinga Web 2 to version 2.11.5 or 2.12.3 or later; as an alternative for version 2.12.2 only, enable Content Security Policy in the application settings.

Recommended fix High confidence

Icinga Web 2 version 2.11.5 (for 2.11.x branch) or version 2.12.3 (for 2.12.x branch)

  1. 1. Identify the currently installed version of Icinga Web 2 by checking the package manager or the application itself
  2. 2. If running a version >= 2.12.0 and < 2.12.3, upgrade to version 2.12.3
  3. 3. If running a version < 2.11.5, upgrade to version 2.11.5
  4. 4. After upgrading, clear any cached data and restart web server services if required
  5. 5. Verify the upgrade was successful by checking the installed version matches the target fixed version
Caveat Review release notes for any configuration or compatibility changes between your current version and the target upgrade version

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Icinga Web 2 Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-27404 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data