opensource-socialnetwork OSSN up to 10.1 OssnMessages ossn_com.php guid resource injection

Summaryinfo

A vulnerability categorized as problematic has been discovered in opensource-socialnetwork OSSN up to 10.1. This issue affects some unknown processing of the file components/OssnMessages/ossn_com.php of the component OssnMessages. Executing a manipulation of the argument guid can lead to resource injection. This vulnerability is registered as CVE-2026-108164. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in opensource-socialnetwork OSSN up to 10.1 and classified as problematic. This vulnerability affects an unknown functionality of the file components/OssnMessages/ossn_com.php of the component OssnMessages. The manipulation of the argument guid with an unknown input leads to a resource injection vulnerability. The CWE definition for the vulnerability is CWE-99. The product receives input from an upstream component, but it does not restrict or incorrectly restricts the input before it is used as an identifier for a resource that may be outside the intended sphere of control. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-108164 since 10/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/10/2026).

By approaching the search of inurl:components/OssnMessages/ossn_com.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-96319). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• opensource-socialnetwork

Name

• OSSN

Version

• 10.0
• 10.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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