CVE-2025-63914 Denial of service in n/a
Attackers can cause denial of service by uploading ZIP bombs that exhaust server resources or disk space during decompression.
- 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-2025-63914?
CVE-2025-63914 is a medium-severity denial of service vulnerability in n/a, published on 24 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in Cinnamon kotaemon 0.11.0. The _may_extract_zip function in the \libs\ktem\ktem\index\file\ui.py file does not check the contents of uploaded ZIP files. Although the contents are extracted into a temporary folder that is cleared before each extraction, successfully uploading a ZIP bomb could still cause the server to consume excessive resources during decompression. Moreover, if no further files are uploaded afterward, the extracted data could occupy disk space and potentially render the system unavailable. Anyone with permission to upload files can carry out this attack.
Weakness: CWE-409
Which versions are affected by CVE-2025-63914?
It affects 1 product.
Products include Cinnamon Kotaemon.
How do I fix CVE-2025-63914?
No fix has been published for CVE-2025-63914 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-2025-63914 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63914 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as GHSA-j3h2-559w-j4x9.