CVE-2025-27909 IBM Concert Software cross-origin resource sharing

Medium 5.4 Published 18 Aug 2025 Updated 18 Aug 2025

An attacker can perform privileged actions due to overly permissive CORS settings in IBM Concert Software.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-27909?

CVE-2025-27909 is a medium-severity vulnerability in Ibm Concert, published on 18 Aug 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-697, CWE-942

Which versions are affected by CVE-2025-27909?

It affects 1 product.

Products include Ibm Concert.

How do I fix CVE-2025-27909?

No fix has been published for CVE-2025-27909 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-27909 being exploited?

There is no known exploitation of CVE-2025-27909 in the wild and no public exploit code.

All Ibm Concert vulnerabilities

Sources

Also known as GHSA-22cj-gf6g-gpgc.