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Nagios XiApplication · Nagios

CVE-2024-13996

CRITICAL · 9.8 CVSS v3.1 Published 2025-10-30
Fix available
A fix is available. Upgrade to 2024 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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
Nagios XI versions prior to 2024R1.1.3 did not invalidate all other active sessions for a user when that user's password was changed. As a result, any pre-existing sessions (including those potentially controlled by an attacker) remained valid after a credential update. This insufficient session expiration could allow continued unauthorized access to user data and actions even after a password change.

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

Nagios XI prior to 2024R1.1.3 fails to invalidate existing user sessions when a password is changed. This means any pre-existing sessions—including those obtained through credential theft, session hijacking, or initial attacker access—remain valid and functional after the legitimate user updates their credentials, allowing persistent unauthorized access.

MitigationUpgrade to Nagios XI 2024R1.1.3 or later which implements proper session invalidation on password changes. As a compensating control, administrators should review and manually terminate suspicious active sessions in the administration panel.

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
Nagios XiApplication
Affected:< 2024= 2024

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
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

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. Identify Nagios XI version
    Run command: rpm -q nagiosxi or check /usr/local/nagiosxi/etc/version.ini, or access About page in web UI
    Affected if Version is earlier than 2024R1.1.3 (any version before this release)
  2. Locate session storage
    Check /usr/local/nagiosxi/var/sessions/ directory or database session tables (usually in nagiosql or similar), examine php.ini for session.save_path
    Affected if Session files or records exist and persist across authentication cycles
  3. Verify session persistence after password change
    As an admin, change a user's password via Users > Manage > Activate Users > Password, then attempt to use a session token created before the password change
    Affected if Pre-existing session cookie/token remains valid after the password modification
  4. Inspect session management configuration
    Review /usr/local/nagiosxi/etc/config.php for session settings, check if session_regenerate_id() is called on authentication events
    Affected if No session regeneration logic present in authentication handlers
  5. Check for multiple concurrent sessions
    Query session database/tables for duplicate user_ids with different session IDs, or review /usr/local/nagiosxi/var/log/nagiosxi.log for session creation events
    Affected if Same user account shows multiple active sessions across different IP addresses or user agents

A user is affected if their Nagios XI installation is version 2024R1.1.2 or earlier and they have not manually invalidated sessions since any password change occurred.

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 2024 or later
Fixed in 2024
Interim mitigation

Upgrade to Nagios XI 2024R1.1.3 or later which implements proper session invalidation on password changes. As a compensating control, administrators should review and manually terminate suspicious active sessions in the administration panel.

Recommended fix High confidence

Nagios XI 2024R1.1.3

  1. Check current Nagios XI version in the web UI (Help > About Nagios XI) or via command: cat /usr/local/nagiosxi/etc/xi-version.txt
  2. Backup the Nagios XI database and configuration files before upgrading
  3. Ensure the system meets prerequisites (disk space, permissions)
  4. Upgrade to Nagios XI 2024R1.1.3 or later using the automatic update wizard: Administration > System Extensions > System Upgrade, or download the update from the Nagios website
  5. After upgrade, verify the version shows 2024R1.1.3 or higher
  6. Test that password changes now properly invalidate all prior sessions
Caveat Review Nagios XI release notes for 2024R1.1.3 for any configuration or feature changes that may affect your setup

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

Fix this in Nagios Xi Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $890
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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-2024-13996 in production — separate from our analysis above.

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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
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