How severe is CVE-2025-27909?

CVE-2025-27909 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-27909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27909?

CVE-2025-27909 affects Ibm Concert. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-27909 have an EU (EUVD) identifier?

Yes. CVE-2025-27909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27737.

When was CVE-2025-27909 published?

CVE-2025-27909 was published on 2025-08-18 and last updated on 2026-06-17.

CVE-2025-27909

CVE-2025-27909 is a medium-severity vulnerability in Ibm Concert with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-697.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27737
Weakness: CWE-697
Affected product: Ibm Concert
Published: 2025-08-18
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-27909?: 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.
How severe is CVE-2025-27909?: CVE-2025-27909 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-27909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27909?: CVE-2025-27909 affects Ibm Concert. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27909 have an EU (EUVD) identifier?: Yes. CVE-2025-27909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27737.
When was CVE-2025-27909 published?: CVE-2025-27909 was published on 2025-08-18 and last updated on 2026-06-17.

References

https://www.ibm.com/support/pages/node/7242354

Affected products (1)

cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*

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