CVE-2026-42418 in Social Rocket Plugin
Summary
by MITRE • 10/06/2026
Unauthenticated Cross Site Scripting (XSS) in Social Rocket <= 1.3.5 versions.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified within Social Rocket versions prior to or equal to 1.3.5 represents a critical security flaw classified as an unauthenticated cross-site scripting issue. This type of vulnerability arises when a web application fails to properly validate, sanitize, or encode user-supplied input before including it in the output sent back to users' browsers. In this specific instance, the lack of adequate input validation allows attackers to inject malicious scripts into pages viewed by other users without requiring any form of authentication. The absence of an access control mechanism for the vulnerable endpoint significantly lowers the barrier to entry for potential adversaries, enabling anyone on the internet with a basic understanding of web technologies to exploit the flaw and execute arbitrary client-side code within the context of the victim's session.
From a technical perspective, this vulnerability aligns closely with CWE-79, which describes Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting. The root cause typically involves server-side processing that directly embeds user input into HTML content without applying appropriate encoding strategies such as HTML entity encoding or JavaScript escaping. When a victim visits the compromised page or interacts with the malicious payload, their browser interprets the injected script as legitimate code belonging to the application's domain. This allows the attacker to bypass same-origin policy restrictions and perform actions on behalf of the user, access sensitive cookies that may contain session tokens, read confidential data displayed within the DOM, and potentially redirect users to phishing sites designed to steal credentials or distribute malware.
The operational impact of this vulnerability is severe due to its unauthenticated nature. Attackers can craft malicious links containing script payloads which, when clicked by a victim, trigger immediate execution in their browser environment. This capability facilitates account takeover attacks if session cookies are not configured with the HttpOnly flag, allowing attackers to hijack active sessions and impersonate legitimate users within the Social Rocket platform. Furthermore, persistent XSS variants could store the malicious payload on the server side, leading to widespread compromise of multiple victims who view affected content over time. The ability to execute arbitrary JavaScript also enables keylogging capabilities, where attacker-controlled scripts monitor keystrokes to capture usernames, passwords, and other sensitive information entered into forms within the application.
Mitigation strategies must focus primarily on rigorous input validation and output encoding practices. Developers should implement a whitelist-based approach for accepting user input, ensuring that only expected characters and formats are processed by the backend systems. On the output side, it is essential to encode data according to its context before rendering it in HTML, JavaScript, CSS, or URL parameters. Utilizing established security libraries that handle encoding automatically can reduce the risk of implementation errors. Additionally, deploying a Web Application Firewall with rulesets tuned for XSS detection can provide an additional layer of defense by blocking malicious payloads at the network perimeter. For immediate remediation, administrators should upgrade Social Rocket to version 1.3.6 or later where this flaw has been addressed through improved sanitization routines and stricter access controls on vulnerable endpoints.
This vulnerability is also mapped to MITRE ATT&CK technique T1059, specifically sub-technique T1059.007 which covers JavaScript execution in web browsers. Understanding the attack chain helps in designing better detection rules for intrusion detection systems that monitor for unusual script injection patterns or anomalous outbound traffic resulting from malicious client-side executions. Security teams should also ensure that Content Security Policy headers are implemented to restrict the sources from which scripts can be loaded, thereby limiting the impact even if an XSS vector is successfully exploited. Regular security audits and static code analysis tools configured to detect CWE-79 instances during development phases will further strengthen the application's resilience against such injection-based attacks.