What is the CVSS score of CVE-2025-27909?

CVE-2025-27909 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Cors Misconfiguration are affected by CVE-2025-27909?

CVE-2025-27909 presents moderate security risk rated CVSS 5.4. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2025-27909?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Cors Misconfiguration CVE-2025-27909

MEDIUM

Permissive Cross-domain Security Policy with Untrusted Domains (CWE-942)

2025-08-18 psirt@us.ibm.com

Information Disclosure IBM Cors Misconfiguration Concert

5.4

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:07 vuln.today

CVE Published

Aug 18, 2025 - 14:15 nvd

MEDIUM 5.4

DescriptionNVD

AnalysisAI

IBM Concert Software 1.0.0 through 1.1.0 uses cross-origin resource sharing (CORS) which could allow an attacker to carry out privileged actions as the domain name is not being limited to only. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-942. IBM Concert Software 1.0.0 through 1.1.0 uses cross-origin resource sharing (CORS) which could allow an attacker to carry out privileged actions as the domain name is not being limited to only trusted domains. Affected products include: Ibm Concert. Version information: through 1.1.0.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2025-27909 vulnerability details – vuln.today

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