CVE-2025-3518
CVE-2025-3518 is a medium-severity vulnerability in Unblu Spark with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.
Key facts
- Severity: Medium (CVSS 3.x base score 4.3)
- CVSS v4: 5.3
- EPSS exploit prediction: 0% (10th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-12325
- Weakness: CWE-284
- Affected product: Unblu Spark
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2025-3518?
- CVE-2025-3518 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
- Is CVE-2025-3518 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-3518?
- CVE-2025-3518 affects Unblu Spark. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-3518?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-3518 have an EU (EUVD) identifier?
- Yes. CVE-2025-3518 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12325.
- When was CVE-2025-3518 published?
- CVE-2025-3518 was published on 2025-04-22 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:unblu:spark:*:*:*:*:*:*:*:*
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