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CVE-2026-70561— TestLink 1.9.20 and prior Authenticated IDOR via attachmentdownload.php

Quick assessment

Affected
TestLinkOpenSourceTRMS TestLink
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.

TestLinkOpenSourceTRMS TestLink是TestLinkOpenSourceTRMS组织开源的一款测试管理平台。 TestLinkOpenSourceTRMS TestLink 1.9.20及之前版本存在授权问题漏洞，该漏洞源于不安全的直接对象引用，导致任何已认证用户（包括低权限访客账户）在向attachmentdownload.php处理程序提供整数附件ID时，无需项目和角色授权检查即可读取任意附件，并可通过枚举附件ID绕过访问控制获取私有项目中的敏感文件。

CVSS 6.5 · Medium EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1135 · Network Share Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
TestLinkOpenSourceTRMS TestLink ≤ 1.9.20 affected
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I. Basic Information for CVE-2026-70561

Vulnerability Information
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Vulnerability Title
TestLink 1.9.20 and prior Authenticated IDOR via attachmentdownload.php
Source: CVE Program / CVE List V5
Vulnerability Description
TestLink 1.9.20 and prior contains an insecure direct object reference vulnerability that allows any authenticated user, including low-privilege guest accounts, to read arbitrary attachments by supplying an integer attachment ID to the attachmentdownload.php handler without any project or role authorization check. Attackers can enumerate sequential integer IDs through the attachment download endpoint to retrieve file contents from private projects they have no membership in, bypassing the per-project access control model and exposing test specifications, requirements documents, execution evidence, and other sensitive uploaded files across the entire installation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A: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
TestLinkOpenSourceTRMS TestLink 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TestLinkOpenSourceTRMS TestLink是TestLinkOpenSourceTRMS组织开源的一款测试管理平台。 TestLinkOpenSourceTRMS TestLink 1.9.20及之前版本存在授权问题漏洞，该漏洞源于不安全的直接对象引用，导致任何已认证用户（包括低权限访客账户）在向attachmentdownload.php处理程序提供整数附件ID时，无需项目和角色授权检查即可读取任意附件，并可通过枚举附件ID绕过访问控制获取私有项目中的敏感文件。
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
TestLinkOpenSourceTRMS TestLink 0 ~ 1.9.20 -

II. Public POCs for CVE-2026-70561

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III. Intelligence Information for CVE-2026-70561

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Vendor Advisories for CVE-2026-70561 (1)

Proof of Concept for CVE-2026-70561 (1)

IV. Related Vulnerabilities

Same weakness: CWE-639

V. Comments for CVE-2026-70561

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