CVE-2025-40723 Stored Cross-Site Scripting (XSS) vulnerability on Flatboard
Attackers can inject malicious scripts via footer and announcement fields, potentially stealing user sessions or executing code 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-2025-40723?
CVE-2025-40723 is a medium-severity cross-site scripting vulnerability in Flatboard, published on 3 Jul 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 versions prior to Flatboard 3.2.2 of Flatboard Pro, consisting of a stored XSS due to lack of proper validation of user input, through the footer_text and announcement parameters in config.php.
Weakness: CWE-79
Which versions are affected by CVE-2025-40723?
How do I fix CVE-2025-40723?
No fix has been published for CVE-2025-40723 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-2025-40723 being exploited?
There is no known exploitation of CVE-2025-40723 in the wild and no public exploit code.
Sources
Also known as GHSA-j7j3-j59j-p82h.