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CVE-2025-49135— CVAT missing validation for in-progress backup upload names

Quick assessment

Affected
cvat-ai cvat
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.

CVAT.ai CVAT是CVAT.ai开源的一个数据处理工具。 CVAT.ai CVAT 2.2.0至2.39.0版本存在安全漏洞，该漏洞源于导入过程中缺少验证，可能导致数据泄露。

AI Predicted 6.5 Difficulty: Easy EPSS 0.30% · P20
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I. Basic Information for CVE-2025-49135

Vulnerability Information
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Vulnerability Title
CVAT missing validation for in-progress backup upload names
Source: CVE Program / CVE List V5
Vulnerability Description
CVAT is an open source interactive video and image annotation tool for computer vision. Versions 2.2.0 through 2.39.0 have no validation during the import process of a project or task backup to check that the filename specified in the query parameter refers to a TUS-uploaded file belonging to the same user. As a result, if an attacker with a CVAT account and a `user` role knows the filenames of other users' uploads, they could potentially access and steal data by creating projects or tasks using those files. This issue does not affect annotation or dataset TUS uploads, since in this case object-specific temporary directories are used. Users should upgrade to CVAT 2.40.0 or a later version to receive a patch. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
CVAT.ai CVAT 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CVAT.ai CVAT是CVAT.ai开源的一个数据处理工具。 CVAT.ai CVAT 2.2.0至2.39.0版本存在安全漏洞，该漏洞源于导入过程中缺少验证，可能导致数据泄露。
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
cvat-ai cvat >= 2.2.0, < 2.40.0 -

II. Public POCs for CVE-2025-49135

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III. Intelligence Information for CVE-2025-49135

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IV. Related Vulnerabilities

Same product: cvat
Same vendor: cvat-ai
Same weakness: CWE-639

V. Comments for CVE-2025-49135

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