What is CVE-2025-33099?

CVE-2025-33099 is a medium-severity vulnerability in Ibm Concert Software, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2025-09-01.

How severe is CVE-2025-33099?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2025-33099 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Ibm Concert Software

CVE-2025-33099

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.

Vulnerability class: Improper Certificate Validation

EPSS: 0.000 (9.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Ibm Concert Software — versions 1.0.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

www.ibm.com/support/pages/node/7243699 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2025-33099?: CVE-2025-33099 is a medium-severity vulnerability in Ibm Concert Software, classified under Improper Certificate Validation. CVSS score: 5.9/10. Published 2025-09-01.
How severe is CVE-2025-33099?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2025-33099 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.