CVE-2025-8591 Reflected Cross-Site Scripting via URL Parameter in Multiple WSO2 Products Enables UI Modification
Attackers can inject scripts via URL parameters to modify UI or steal data, though session hijacking is prevented by httpOnly cookies.
- 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-2025-8591?
CVE-2025-8591 is a medium-severity cross-site scripting vulnerability in Wso2 Api Manager, published on 6 Jul 2026. 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
The software accepts user-supplied input via a URL parameter without adequate output encoding before reflecting it back to the user's browser. This condition allows an attacker to inject malicious script content into pages served by the application.
By leveraging this weakness, an attacker can cause the user's browser to redirect to a malicious website, modify the UI of the webpage, or retrieve information from the browser. However, the impact is mitigated by the use of httpOnly flags on session-related cookies, preventing session hijacking.
Weakness: CWE-79
Which versions are affected by CVE-2025-8591?
It affects 8 products.
Products include Wso2 Api Control Plane, Wso2 Api Manager, Wso2 Identity Server, Wso2 Identity Server as Key Manager, Wso2 Open Banking Am, Wso2 Open Banking Iam and 2 more.
How do I fix CVE-2025-8591?
No fix has been published for CVE-2025-8591 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-2025-8591 being exploited?
There is no known exploitation of CVE-2025-8591 in the wild and no public exploit code.
Other vulnerabilities in Wso2 Api Manager
- CVE-2026-5430 WSO2 Multiple Products Path Traversal Vulnerability
- CVE-2026-1728 Privilege Escalation via System REST APIs in Multiple WSO2 Products Permits Admin Account Takeover
- CVE-2025-9312 Improper Certificate-Based Authentication Enforcement in Multiple WSO2 Products
- CVE-2025-10611 Potential Broken Access Control in Multiple WSO2 Products via System REST APIs
- CVE-2025-9152 Improper Privilege Management in Multiple WSO2 API Manager via keymanager-operations DCR Endpoint
Sources
Also known as GHSA-gqrf-mwwc-fmq5.