CVE-2026-113388 in opensource-socialnetwork
Summary
by MITRE • 10/20/2026
A security flaw has been discovered in opensource-socialnetwork up to 9.11/10.1. This affects the function input of the file actions/administrator/cache/dynamic.php of the component Cache Settings. Performing a manipulation of the argument host/port/username/password/type/status results in code injection. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The patch is named 40945057cb451f0f35153110bc7e889c094400e1. Applying a patch is the recommended action to fix this issue. The vendor explains: "While we have implemented this patch as a defense-in-depth measure, we emphasize that in Open Source Social Network (OSSN), site administrators are fully trusted users who are intentionally granted broad system authority by design including the native ability to upload custom components/themes containing arbitrary PHP code."
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/20/2026
The vulnerability identified in Open Source Social Network versions up through 9.11 and 10.1 represents a critical server-side code injection flaw located within the administrative interface, specifically affecting the Cache Settings component. The technical root cause resides in the input handling function of the file actions/administrator/cache/dynamic.php. This module is responsible for managing caching configurations but fails to adequately sanitize or validate user-supplied data before processing it. Specifically, arguments such as host, port, username, password, type, and status are accepted without sufficient restriction on their content. An attacker who has gained access to the administrative panel can manipulate these parameters to inject arbitrary PHP code into the application's execution context. This flaw is classified under CWE-94 Improper Control of Generation of Code (Code Injection), as it allows for the direct injection of executable script commands through improperly validated input fields.
The operational impact of this vulnerability is severe due to its remote nature and the privileges required to exploit it. While the attack vector requires initial access to the administrative interface, which typically implies authentication, the ability to execute arbitrary code effectively grants the attacker full control over the underlying server environment. Once the malicious payload is executed via the cache configuration parameters, an adversary can perform a wide range of destructive actions including data exfiltration, modification of application logic, installation of backdoors, or complete system compromise. The fact that exploit code has been released to the public significantly lowers the barrier for entry, allowing less sophisticated threat actors to leverage this vulnerability in automated attacks against instances where administrative credentials have been compromised through other means such as credential stuffing or phishing.
From a defensive architecture perspective, this incident highlights the tension between convenience and security in open-source platforms that empower administrators with broad system authority. The vendor's explanation notes that site administrators are intentionally granted extensive privileges to allow for deep customization, including uploading custom components and themes containing arbitrary PHP code. This design choice inherently increases the attack surface because any vulnerability within an administrative tool can be leveraged by a compromised admin account to achieve remote code execution. In terms of industry frameworks, this scenario aligns with MITRE ATT&CK techniques related to Command and Scripting Interpreter abuse, where attackers use legitimate system tools or interfaces to execute malicious commands. The lack of strict separation between configuration data and executable logic in the dynamic.php file exemplifies a failure in secure coding practices regarding input validation and output encoding.
Mitigation strategies must prioritize immediate patch application as recommended by the vendor via commit 40945057cb451f0f35153110bc7e889c094400e1. This patch addresses the input validation gaps within the cache settings module, ensuring that only expected data types and formats are processed. Beyond applying the update, organizations should enforce strict access controls on administrative interfaces to prevent unauthorized or compromised accounts from accessing these sensitive configuration pages. Implementing multi-factor authentication for all administrator roles is critical to reducing the risk of credential compromise leading to exploitation. Additionally, deploying a Web Application Firewall can provide an additional layer of defense by detecting and blocking patterns associated with code injection attempts in HTTP requests targeting administrative endpoints. Regular security audits focusing on input validation across all administrative modules are also essential to maintain resilience against similar vulnerabilities that may exist elsewhere in the application architecture.