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.
Published: 2026-10-10
Score: 7.1 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 10 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
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.
Title Open Source Social Network (OSSN) through 10.1 IDOR via Message Attachment Route
First Time appeared Opensource-socialnetwork
Opensource-socialnetwork open Source Social Network
Weaknesses CWE-639
CPEs cpe:2.3:a:opensource-socialnetwork:open_source_social_network:*:*:*:*:*:*:*:*
Vendors & Products Opensource-socialnetwork
Opensource-socialnetwork open Source Social Network
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'}


Subscriptions

Opensource-socialnetwork Open Source Social Network
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-10T13:55:14.834Z

Reserved: 2026-10-09T15:41:44.133Z

Link: CVE-2026-108164

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-10T14:16:37.663

Modified: 2026-10-10T14:16:37.663

Link: CVE-2026-108164

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-10T15:30:17Z

Weaknesses
  • CWE-639

    Authorization Bypass Through User-Controlled Key