CVE-2025-33084Network attack vector

Information disclosure via missing HSTS enforcement

Published Sep 1, 2025 · Updated Sep 2, 2025

Information disclosure in IBM Concert 1.0.0 through 1.1.0 allows remote attackers to obtain sensitive data through HTTPS downgrade attacks. Concert's HTTP response configuration fails to enable HSTS, so browsers do not enforce HTTPS for subsequent connections. Exploitation requires a man-in-the-middle position; successful interception exposes sensitive information without reported integrity or availability impact.

CVSS severity5.9
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in IBM Concert 1.0.0 through 1.1.0 allows remote attackers to obtain sensitive data through HTTPS downgrade attacks. Concert's HTTP response configuration fails to enable HSTS, so browsers do not enforce HTTPS for subsequent connections. Exploitation requires a man-in-the-middle position; successful interception exposes sensitive information without reported integrity or availability impact.

The record

CVE
CVE-2025-33084
Published
Sep 1, 2025
Updated
Sep 2, 2025
Vendor
IBM
Product
IBM Concert
Classifications
CWE-327, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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=1.0.0 <=1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Concertversion=1.0.0 <=1.1.0

Published CVSS scores

5.9IBMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1557Adversary-in-the-Middle

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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