CVE-2025-40807 Auth bypass in Gridscale X Prepay
Attackers can replay authentication tokens to maintain sessions for locked-out users, bypassing account lockout mechanisms in Gridscale X Prepay.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-40807?
CVE-2025-40807 is a medium-severity authentication bypass vulnerability in Siemens Gridscale X Prepay, published on 9 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been identified in Gridscale X Prepay (All versions < V4.2.1). The affected application is vulnerable to capture-replay of authentication tokens. This could allow an authenticated but already locked-out user to establish still valid user sessions.
Weakness: CWE-294
Which versions are affected by CVE-2025-40807?
It affects 1 product.
Products include Siemens Gridscale X Prepay.
How do I fix CVE-2025-40807?
No fix has been published for CVE-2025-40807 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-40807 being exploited?
There is no known exploitation of CVE-2025-40807 in the wild and no public exploit code.
Other vulnerabilities in Siemens Gridscale X Prepay
Sources
Also known as GHSA-mfph-p7r3-jvfm.