CVE-2026-78295 in Xagio SEO Plugin
Summary
by MITRE • 09/17/2026
Unauthenticated Cross Site Request Forgery (CSRF) in Xagio SEO <= 7.1.0.43 versions.
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Analysis
by VulDB Data Team • 09/17/2026
The vulnerability identified as an unauthenticated Cross-Site Request Forgery within the Xagio SEO plugin for WordPress, specifically affecting versions up to and including 7.1.0.43, represents a significant security flaw that undermines the integrity of administrative actions through maliciously crafted requests. This type of attack exploits the trust that a web application has in a user's browser, allowing an attacker to trick authenticated administrators into performing unintended actions without their knowledge or consent. The core technical issue lies in the absence of proper anti-CSRF tokens or validation mechanisms within specific endpoints handled by this plugin. When a logged-in administrator visits a maliciously constructed webpage controlled by an adversary, the browser automatically includes session cookies and authentication credentials with any requests sent to the target site. If the vulnerable endpoint does not verify that the request originated from a legitimate page on the same domain via a unique, unpredictable token, it will process the forged request as if it were valid.
From a technical perspective, this vulnerability falls under the category of CWE-352, which is defined as Cross-Site Request Forgery (CSRF). The lack of synchronization tokens means that the application fails to distinguish between requests initiated by the user and those initiated by third-party scripts embedded in external sites. In many WordPress plugins, administrative functions such as changing settings, updating configurations, or modifying database entries are accessible via HTTP POST or GET requests without sufficient state verification. An attacker can craft a simple HTML page containing an auto-submitting form that targets these specific endpoints within the Xagio SEO plugin. When an administrator with active privileges views this page, their browser sends the request to the WordPress installation, effectively allowing the attacker to alter site configurations remotely. This is particularly dangerous because it requires no prior authentication from the attacker and can be executed simply by luring a victim into visiting a URL or loading an image tag that triggers the malicious script.
The operational impact of this vulnerability extends beyond simple configuration changes. Depending on how the Xagio SEO plugin handles administrative inputs, successful exploitation could lead to unauthorized modification of search engine optimization settings, insertion of malicious meta tags, or alteration of site-wide parameters that affect visibility and security posture. In more severe scenarios, if the vulnerable endpoints allow for broader system interactions, an attacker might escalate privileges by manipulating user roles or disabling security features managed through the plugin’s interface. This compromises the confidentiality, integrity, and availability of the web application. Furthermore, because CSRF attacks are often stealthy and do not leave obvious traces in server logs distinct from normal traffic, detection can be challenging without specialized monitoring tools that analyze request origins and token validity.
Industry standards such as MITRE ATT&CK classify this behavior under techniques related to social engineering and browser-based exploitation, specifically aligning with T1074 or similar vectors where attackers leverage trusted relationships within a system. To mitigate this risk, immediate action is required by updating the Xagio SEO plugin to a version that addresses these flaws, typically those released after 7.1.0.43 which implement proper anti-CSRF protections. Developers should ensure that all state-changing operations require unique, unpredictable tokens generated per session and validated on the server side before execution. Additionally, implementing SameSite cookie attributes can provide an additional layer of defense by restricting how cookies are sent with cross-site requests. Site administrators should also enforce strong password policies and multi-factor authentication to reduce the impact if a CSRF attack succeeds in altering credentials or settings, ensuring that even if unauthorized changes occur, they cannot be easily exploited for further compromise without secondary verification steps.