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Vulnerabilities

Vulnerability · CVE-2025-3518

It technically possible for a user to upload a file to a conversation despite the file upload functionality being disabled.

Published Apr 22, 2025 · catalog updated Apr 24, 2025 · Unblu inc. Unblu Spark

Check if you run it

No confirmed exploitation is on record for CVE-2025-3518. EPSS is 0.24%. Act only if a listed version of Unblu inc. Unblu Spark is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.24%
Remediation
Advisory link
Affected products
vendor Unblu inc. Unblu Spark 8.0.0 ≤8.12.1

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Unblu inc. Unblu Spark 8.0.0 ≤8.12.18.0.0 ≤8.12.1

How to fix CVE-2025-3518

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-3518. EPSS is 0.24%. Act only if a listed version of Unblu inc. Unblu Spark is installed.

Which versions are affected?

Compare what you have installed with Unblu inc. Unblu Spark 8.0.0 ≤8.12.1 8.0.0 ≤8.12.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.24%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 22, 2025 · EUVD

    Detected

    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, int

  2. Apr 24, 2025 · EUVD

    Updated

    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, int

Sources

  • CVE.orgVulnerability recordCVE-2025-3518

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-3518

    30-day exploitation probability 0.2%

    first.org
  • EUVDVulnerability recordEUVD-2025-12325

    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 on

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.