CVE-2025-3518 File upload functionality possible even when disabled
Attackers can upload files via direct API requests even when file upload functionality is disabled in the configuration.
- 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-2025-3518?
CVE-2025-3518 is a medium-severity vulnerability in Unblu Spark, published on 22 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
It technically possible for a user to upload a file to a conversation despite the file upload functionality being disabled.
The file upload functionality can be enabled or disabled for specific use cases through configuration. In case the functionality is disabled for at least one use case, the system nevertheless allows files to be uploaded through direct API requests. During the upload file, interception and allowed file type rules are still applied correctly.
If file sharing is generally enabled, this issue is not of concern.
Weakness: CWE-284
Which versions are affected by CVE-2025-3518?
It affects 1 product.
Products include Unblu Spark.
How do I fix CVE-2025-3518?
No fix has been published for CVE-2025-3518 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-3518 being exploited?
There is no known exploitation of CVE-2025-3518 in the wild and no public exploit code.
Sources
Also known as GHSA-4mxw-7rp7-fhjr.