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ConcertApplication · Ibm

CVE-2025-33099

MEDIUM · 5.9 CVSS v3.1 Published 2025-09-01
Fix available
A fix is available. Upgrade to 2.0.0 or later.
See remediation →
68/100
Remediation priority · Elevated
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
IBM Concert Software 1.0.0 through 1.1.0 could allow a remote attacker to perform unauthorized actions using man in the middle techniques due to improper certificate validation.

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 · moderate confidence

IBM Concert Software versions 1.0.0 through 1.1.0 contains improper SSL/TLS certificate validation, allowing remote attackers to intercept communications via man-in-the-middle attacks and perform unauthorized actions due to the application accepting invalid or malicious certificates.

MitigationUpdate to a patched version of IBM Concert Software that implements proper certificate chain validation and rejects untrusted or self-signed certificates.

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
ConcertApplication
Affected:>= 1.0.0, < 2.0.0

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
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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. Identify IBM Concert installation version
    Check the installed version of IBM Concert Software using the product's version command, package manager, or installed programs list. Common methods include: 'ibmconcert --version', checking the installation directory metadata, or using system package queries.
    Affected if The installed version is 1.0.0, 1.0.x, or 1.1.0 (any version >= 1.0.0 and < 2.0.0)
  2. Determine if SSL/TLS network communication is enabled
    Review the IBM Concert configuration files, startup scripts, or environment settings to verify whether SSL/TLS encrypted communication is configured and active.
    Affected if SSL/TLS is enabled and the application performs network communications
  3. Check for custom SSL/TLS trust store configuration
    Inspect the IBM Concert configuration for custom trust store settings, particularly any options that might allow disabling certificate validation or specifying custom trust material.
    Affected if A custom trust store is configured or certificate validation is explicitly disabled in the configuration
  4. Verify certificate validation behavior in network traffic
    Use network capture tools (such as Wireshark or openssl s_client) to test whether the application accepts self-signed, expired, or invalid certificates when connecting to endpoints.
    Affected if The application accepts certificates that fail standard validation (expired, self-signed, mismatched hostname, untrusted CA)

You are affected if IBM Concert version 1.0.0 through 1.1.0 is installed and SSL/TLS is in use, particularly if custom certificate handling is configured or invalid certificates are accepted.

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 2.0.0 or later
Fixed in 2.0.0
Interim mitigation

Update to a patched version of IBM Concert Software that implements proper certificate chain validation and rejects untrusted or self-signed certificates.

Recommended fix Moderate confidence

IBM Concert Software version 2.0.0 or later

  1. Identify the current IBM Concert Software version in use
  2. Review the IBM Concert Software 2.0.0 release notes and migration documentation
  3. Plan and schedule a maintenance window for the upgrade
  4. Backup all configuration files, data, and any custom integrations
  5. Stop the IBM Concert service
  6. Upgrade IBM Concert Software to version 2.0.0 or later
  7. Verify the upgrade was successful and the service starts correctly
  8. Test that certificate validation is working properly with valid SSL/TLS certificates
Caveat Review release notes for any changes in configuration format, API behavior, or deprecated features between versions 1.x and 2.0

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

Fix this in Concert Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.

Scan for this in your stack

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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-2025-33099 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