CVE-2025-1625 in Qi Blocks Plugin
Summary
by MITRE • 05/19/2025
The Qi Blocks WordPress plugin before 1.4 does not validate and escape some of its Counter block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 01/10/2026
The vulnerability identified as CVE-2025-1625 affects the Qi Blocks WordPress plugin version 1.4 and earlier, presenting a significant security risk through stored cross-site scripting attacks. This flaw exists within the Counter block functionality where the plugin fails to properly validate and escape user-supplied input parameters before rendering them in web pages. The vulnerability specifically targets the plugin's handling of block options, creating an attack surface that allows malicious actors with contributor-level permissions or higher to inject malicious scripts into the WordPress environment. This represents a critical escalation vector since contributors typically have limited capabilities but can now potentially execute arbitrary code within the context of other users' browsers.
The technical implementation of this vulnerability stems from inadequate input sanitization practices within the plugin's Counter block processing logic. When users with contributor privileges or above create or modify Counter block options, the plugin stores these values without proper validation mechanisms or output escaping. This allows attackers to inject malicious JavaScript code through the block configuration parameters, which then gets executed whenever the affected page or post is rendered. The stored nature of this vulnerability means that the malicious scripts persist in the database and execute every time the content is viewed, making it particularly dangerous for content management systems where multiple users interact with shared content. The flaw aligns with CWE-79 which specifically addresses cross-site scripting vulnerabilities due to insufficient input validation and output escaping.
From an operational impact perspective, this vulnerability exposes WordPress sites to persistent XSS attacks that can compromise user sessions, steal sensitive information, or redirect visitors to malicious websites. Attackers could leverage this vulnerability to execute scripts that manipulate the user interface, capture keystrokes, or perform actions on behalf of authenticated users. The attack vector is particularly concerning because it requires only contributor-level privileges, which are commonly granted to content creators, editors, or authors within WordPress installations. This means that even users who should have limited capabilities can potentially escalate their privileges through this vulnerability. The attack surface extends beyond simple script execution to include potential data exfiltration, session hijacking, and the ability to modify content in ways that could affect site integrity and user trust.
Mitigation strategies for CVE-2025-1625 should prioritize immediate plugin updates to version 1.4 or later, where the validation and escaping mechanisms have been implemented. Organizations should also implement additional security measures including role-based access control reviews to ensure that users with contributor privileges are not unnecessarily granted access to block editing functionality. Input validation should be enforced at multiple layers including client-side and server-side sanitization, with proper output escaping mechanisms implemented for all dynamic content. Security monitoring should include detection of suspicious block modifications and regular vulnerability scanning of WordPress installations. The ATT&CK framework categorizes this vulnerability under T1546.001 for modification of system binaries and T1059.001 for command and scripting interpreter, highlighting the potential for privilege escalation and persistent access. Organizations should also consider implementing Content Security Policy headers to provide additional protection against XSS attacks and ensure that all user-generated content is properly sanitized before rendering.