CVE-2025-40633 Stored Cross-Site Scripting (XSS) in Koibox
An authenticated attacker can inject malicious JavaScript via profile picture uploads, potentially leading to session hijacking or code execution in victim browsers.
- 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-2025-40633?
CVE-2025-40633 is a medium-severity cross-site scripting vulnerability in Koibox, published on 20 May 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A Stored Cross-Site Scripting (XSS) vulnerability has been found in Koibox for versions prior to e8cbce2. This vulnerability allows an authenticated attacker to upload an image containing malicious JavaScript code as profile picture in the '/es/dashboard/clientes/ficha/' endpoint
Weakness: CWE-79
Which versions are affected by CVE-2025-40633?
How do I fix CVE-2025-40633?
No fix has been published for CVE-2025-40633 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-2025-40633 being exploited?
There is no known exploitation of CVE-2025-40633 in the wild and no public exploit code.
Sources
Also known as GHSA-xrqm-569v-qj6w.