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CVE-2026-108164— Open Source Social Network (OSSN) through 10.1 IDOR via Message Attachment Route

Quick assessment

Affected
opensource-socialnetwork opensource-socialnetwork
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.

Open Source Social Network（OSSN）10.1 及以下版本在 文件中存在不安全的直接对象引用（IDOR）漏洞。该漏洞允许已认证用户读取其他用户的私有消息附件。攻击者可以通过顺序遍历或猜测文件的全局唯一标识符（GUID），向 路由发起请求，从而在无需验证发送方或接收方身份的情况下，获取私有对话中的附件。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
opensource-socialnetwork opensource-socialnetwork ≤ 10.1 affected
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I. Basic Information for CVE-2026-108164

Vulnerability Information
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Vulnerability Title
Open Source Social Network (OSSN) through 10.1 IDOR via Message Attachment Route
Source: CVE Program / CVE List V5
Vulnerability Description
Open Source Social Network (OSSN) through 10.1 contains an insecure direct object reference vulnerability in components/OssnMessages/ossn_com.php that allows authenticated users to read other users' private message attachments. Attackers can request the /messages/attachment/{guid} route with sequential or guessed file GUIDs to retrieve attachments from private conversations without sender or recipient verification.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
opensource-socialnetwork opensource-socialnetwork 0 ~ 10.1 -

II. Public POCs for CVE-2026-108164

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III. Intelligence Information for CVE-2026-108164

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Patches & Fixes for CVE-2026-108164 (2)

Vendor Advisories for CVE-2026-108164 (1)

Proof of Concept for CVE-2026-108164 (1)

News Coverage for CVE-2026-108164 (1)

IV. Related Vulnerabilities

Same product: opensource-socialnetwork
Same vendor: opensource-socialnetwork
Same weakness: CWE-639

V. Comments for CVE-2026-108164

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