CVE-2025-5591 Stored Cross-site Scripting (XSS) in Kentico Xperience 13
Attackers can inject malicious scripts into form components to hijack user sessions and perform actions in their security context.
- 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-2025-5591?
CVE-2025-5591 is a high-severity cross-site scripting vulnerability in Kentico Xperience, published on 5 Jan 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
Kentico Xperience 13 is vulnerable to a stored cross-site scripting attack via a form component, allowing an attacker to hijack a victim user’s session and perform actions in their security context.
Which versions are affected by CVE-2025-5591?
It affects 1 product.
Products include Kentico Xperience.
How do I fix CVE-2025-5591?
No fix has been published for CVE-2025-5591 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-2025-5591 being exploited?
There is no known exploitation of CVE-2025-5591 in the wild and no public exploit code.
Other vulnerabilities in Kentico Xperience
- CVE-2025-2746 Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel
- CVE-2025-2747 Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel
- CVE-2019-10068 Kentico Xperience Deserialization of Untrusted Data
- CVE-2025-2749 Kentico Xperience Path Traversal
- CVE-2017-17736 Missing authorization in n/a
Sources
Also known as GHSA-8f4c-27f5-j68q.