CVE-2025-36431 XSS Security Vulnerability in response header affects IBM Sterling B2B Integrator and IBM Sterling File Gateway

Medium 5.4 Published 30 Jul 2026 Updated 30 Jul 2026

Authenticated users can inject JavaScript into the Web UI, potentially stealing credentials from trusted sessions in IBM Sterling B2B Integrator and File Gateway.

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

What is CVE-2025-36431?

CVE-2025-36431 is a medium-severity cross-site scripting vulnerability in Ibm Sterling B2b Integrator, published on 30 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

IBM Sterling B2B Integrator 6.2.2.0 through 6.2.2.0_1 and IBM Sterling File Gateway 6.2.2.0 through 6.2.2.0_1 is vulnerable to cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.

Weakness: CWE-79

Which versions are affected by CVE-2025-36431?

It affects 2 products.

Products include Ibm Sterling B2b Integrator, Ibm Sterling File Gateway.

How do I fix CVE-2025-36431?

No fix has been published for CVE-2025-36431 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-36431 being exploited?

There is no known exploitation of CVE-2025-36431 in the wild and no public exploit code.

All Ibm Sterling B2b Integrator vulnerabilities

Sources

Also known as GHSA-3g3v-4g9j-fq2m.