Vulnerability in Unblu Spark
CVE-2025-3518
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Unblu Spark
- Unblu Inc. Spark — versions 7.54.1, 8.13.1, 7.0.0
Weakness classification (CWE)
References
- www.unblu.com/en/docs/latest/security-bulletins/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-3518?
- CVE-2025-3518 is a medium-severity vulnerability in Unblu Spark, classified under Improper Access Control. CVSS score: 4.3/10. Published 2025-04-22.
- How severe is CVE-2025-3518?
- Medium severity. CVSS v3 base score is 4.3 out of 10.