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.
Advisories

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Fixes

Solution

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Workaround

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History

Mon, 10 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 08 Aug 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Testlinkopensourcetrms
Testlinkopensourcetrms testlink
Vendors & Products Testlinkopensourcetrms
Testlinkopensourcetrms testlink

Fri, 07 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title TestLink 1.9.20 and prior Authenticated IDOR via attachmentdownload.php
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-10T12:00:53.576Z

Reserved: 2026-08-04T19:19:05.907Z

Link: CVE-2026-70561

cve-icon Vulnrichment

Updated: 2026-08-10T12:00:48.891Z

cve-icon NVD

Status : Received

Published: 2026-08-07T19:18:53.277

Modified: 2026-08-10T13:20:38.487

Link: CVE-2026-70561

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-08T20:40:46Z

Weaknesses