CVE-2026-66635 in Slider Plugin
Summary
by MITRE • 08/18/2026
Unauthenticated Cross Site Request Forgery (CSRF) in Slider by 10Web <= 1.2.62 versions.
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Analysis
by VulDB Data Team • 08/18/2026
The vulnerability identified as an unauthenticated Cross-Site Request Forgery within the Slider plugin for WordPress, specifically affecting versions up to and including 1.2.62 developed by 10Web, represents a critical security flaw that undermines the integrity of administrative actions through browser-based coercion. This type of attack exploits the inherent trust that web applications place in user browsers, allowing an attacker to trick an authenticated administrator into performing unintended actions without their knowledge or consent. The core technical deficiency lies in the absence of robust anti-CSRF tokens or validation mechanisms within the HTTP requests responsible for modifying slider configurations. Because these endpoints do not verify the origin of the request against a secure session token, any maliciously crafted HTML page can trigger state-changing operations simply by having an administrator with active privileges visit it while logged into their WordPress dashboard.
From a technical perspective, this vulnerability falls squarely under CWE-352, which defines Cross-Site Request Forgery as a subclass of trust exploitation where the application fails to distinguish between legitimate user-initiated requests and those forged by third parties. The attacker constructs a malicious webpage containing hidden forms or JavaScript-driven AJAX calls that mimic valid administrative API endpoints used for creating, updating, or deleting sliders within the WordPress environment. When an administrator with sufficient privileges accesses this page, their browser automatically includes session cookies associated with the target site, thereby authenticating the forged request. This allows the attacker to manipulate slider settings, inject malicious content into slides, or potentially disrupt website functionality without needing valid credentials for the initial attack vector itself.
The operational impact of this vulnerability is significant due to its unauthenticated nature and the high privilege level typically required for managing sliders in WordPress environments. An successful exploitation could lead to defacement of public-facing web pages if attackers modify slide content to display malicious advertisements, phishing links, or inappropriate material. Furthermore, it can result in service disruption by deleting critical slider elements that drive user engagement on landing pages. In more sophisticated scenarios, the attacker might leverage this access point as a stepping stone for further attacks, such as injecting persistent backdoors into theme files if the plugin allows file uploads through its interface, thereby escalating from simple content manipulation to full server compromise.
This attack vector aligns with several techniques in the MITRE ATT&CK framework, particularly T1071 Application Layer Protocol where attackers use standard web protocols like HTTP/HTTPS to exfiltrate data or execute commands, and potentially T1566 Phishing if social engineering is used to lure administrators into visiting the malicious site. The lack of authentication requirements for triggering these actions makes it a high-risk vulnerability that can be exploited remotely by any internet user with minimal technical expertise beyond basic HTML knowledge.
Mitigation strategies must focus on implementing strict input validation and state verification mechanisms immediately upon upgrading or patching the plugin to version 1.2.63 or later, where such flaws are typically addressed by developers. Administrators should ensure that all administrative endpoints require non-predictable anti-CSRF tokens embedded in forms and validated server-side before processing any changes. Additionally, implementing SameSite cookie attributes set to Strict or Lax can provide an additional layer of defense by preventing browsers from sending cookies with cross-site requests. Regular security audits and the use of Web Application Firewalls configured to detect anomalous request patterns can also help mitigate risks associated with CSRF vulnerabilities in WordPress ecosystems until patches are fully deployed across all affected installations.