CVE-2025-40647 Stored Cross-Site Scripting (XSS) vulnerability in Issabel products
Attackers can inject malicious scripts via the email parameter in the address book, potentially compromising user sessions and data.
- 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-2025-40647?
CVE-2025-40647 is a medium-severity cross-site scripting vulnerability in Issabel, issabel-agenda module Issabel, published on 1 Oct 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
Stored Cross-Site Scripting (XSS) vulnerability in Issabel v5.0.0, consisting of a stored XSS due to a lack of proper validation of user input, through the 'email' parameter in '/index.php?menu=address_book'.
Weakness: CWE-79
Which versions are affected by CVE-2025-40647?
How do I fix CVE-2025-40647?
No fix has been published for CVE-2025-40647 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-2025-40647 being exploited?
There is no known exploitation of CVE-2025-40647 in the wild and no public exploit code.
Sources
Also known as GHSA-4545-9995-wr4m.