CVE-2025-30188 Denial of service in OX App Suite
Attackers can cause denial of service by flooding caches with malicious API requests, affecting Open-Xchange App Suite availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-30188?
CVE-2025-30188 is a high-severity denial of service vulnerability in Open-Xchange GmbH OX App Suite, published on 31 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Malicious or unintentional API requests can be used to add significant amount of data to caches. Caches may evict information that is required to operate the web frontend, which leads to unavailability of the component. Please deploy the provided updates and patch releases. No publicly available exploits are known
Weakness: CWE-400
Which versions are affected by CVE-2025-30188?
How do I fix CVE-2025-30188?
No fix has been published for CVE-2025-30188 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-30188 being exploited?
There is no known exploitation of CVE-2025-30188 in the wild and no public exploit code.
Sources
Also known as GHSA-rhr5-9wg9-p26f.