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CVE-2025-3518— File upload functionality possible even when disabled

Quick assessment

Affected
Unblu inc. Unblu Spark
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Unblu Spark是瑞士Unblu公司的一种以对话为核心的数字客户体验平台中的一个关键组件。 Unblu Spark存在安全漏洞，该漏洞源于文件上传功能禁用时仍可通过直接API请求上传文件。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation
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I. Basic Information for CVE-2025-3518

Vulnerability Information
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Vulnerability Title
File upload functionality possible even when disabled
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Unblu Spark 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Unblu Spark是瑞士Unblu公司的一种以对话为核心的数字客户体验平台中的一个关键组件。 Unblu Spark存在安全漏洞，该漏洞源于文件上传功能禁用时仍可通过直接API请求上传文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unblu inc. Unblu Spark 7.54.1 -

II. Public POCs for CVE-2025-3518

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III. Intelligence Information for CVE-2025-3518

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Vendor Advisories for CVE-2025-3518 (1)

IV. Related Vulnerabilities

Same product: Unblu Spark
Same vendor: Unblu inc.

V. Comments for CVE-2025-3518

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