CVE-2025-1626 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 Countdown 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.
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Analysis
by VulDB Data Team • 01/10/2026
The vulnerability identified as CVE-2025-1626 affects the Qi Blocks WordPress plugin version 1.4 and earlier, presenting a critical security risk through stored cross-site scripting flaws. This issue arises from insufficient input validation and output escaping mechanisms within the plugin's Countdown block functionality, creating an avenue for malicious actors to inject persistent malicious scripts into WordPress pages and posts. The vulnerability specifically targets the plugin's handling of block options, where user-provided data is not adequately sanitized before being rendered back to end users, thereby enabling attackers to execute arbitrary JavaScript code within the context of other users' browsers.
The technical flaw manifests in the plugin's failure to properly validate and escape user inputs within the Countdown block options. When contributors and higher-privileged users create or modify content containing these blocks, the plugin stores the user-supplied parameters without sufficient sanitization processes. This weakness allows attackers to embed malicious scripts within the block configuration options, which then get executed whenever the affected page or post is viewed by other users. The vulnerability operates as a stored XSS attack because the malicious code is permanently saved within the WordPress database rather than being executed through a single request, making it particularly dangerous as it can affect multiple users over extended periods.
The operational impact of this vulnerability extends significantly beyond simple script execution, as it enables attackers with contributor privileges or higher to compromise user sessions and potentially escalate their privileges within the WordPress environment. According to CWE-79, this vulnerability directly maps to Cross-Site Scripting flaws in web applications, where improper input validation leads to malicious code execution. The ATT&CK framework categorizes this as a code injection technique under T1566, specifically targeting web application vulnerabilities that allow persistent malicious code execution. The ability for contributors to exploit this vulnerability is particularly concerning as it bypasses typical content moderation restrictions, potentially allowing attackers to compromise not only individual user sessions but also access sensitive administrative functions through session hijacking or credential theft mechanisms.
Mitigation strategies for CVE-2025-1626 should prioritize immediate plugin updates to version 1.4 or later, which includes proper input validation and output escaping mechanisms. Administrators should implement comprehensive content security policies and regularly audit user roles to minimize the attack surface, ensuring that only trusted users have contributor or higher privileges. Additionally, implementing web application firewalls and security monitoring systems can help detect and prevent exploitation attempts. The remediation process should include thorough scanning of existing content for potential malicious scripts and establishing proper input validation procedures for all user-generated content within WordPress plugins. Organizations should also consider implementing strict access controls and regular security assessments to prevent similar vulnerabilities from emerging in other plugin components or custom WordPress development projects.