CVE-2026-1911 in Twitter Feeds Plugin
Summary
by MITRE • 03/21/2026
The Twitter Feeds plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tweet_title' parameter in the 'TwitterFeeds' shortcode in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2026-1911 affects the Twitter Feeds plugin for WordPress, specifically targeting versions up to and including 1.0.0. This represents a critical security flaw that exploits stored cross-site scripting vulnerabilities within the plugin's shortcode functionality. The vulnerability manifests through the 'tweet_title' parameter in the 'TwitterFeeds' shortcode, where inadequate input sanitization and output escaping create an attack vector that can be exploited by authenticated users with Contributor-level privileges or higher. The flaw enables attackers to inject malicious web scripts that persist in the system and execute automatically when users access affected pages, creating a persistent threat that can compromise user sessions and potentially escalate to more severe attacks.
The technical implementation of this vulnerability stems from insufficient validation and sanitization of user input within the plugin's shortcode processing mechanism. When the 'tweet_title' parameter is processed, the plugin fails to properly sanitize or escape the input before storing it in the database or rendering it in web pages. This allows malicious payloads to be stored and subsequently executed in the context of other users' browsers. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and demonstrates how inadequate input validation can create persistent attack vectors. The stored nature of this XSS vulnerability means that the malicious scripts remain embedded in the system until manually removed, creating an ongoing risk for any user who accesses pages containing the injected content.
From an operational perspective, this vulnerability presents significant risks to WordPress installations using the affected plugin. Attackers with Contributor-level access can leverage this flaw to execute arbitrary scripts in the browsers of other users, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The impact extends beyond individual user compromise, as the vulnerability can be used to spread malicious payloads across multiple users within the same WordPress installation. The attack requires minimal privileges, making it particularly dangerous since it can be exploited by users who normally have limited access rights. This vulnerability also aligns with ATT&CK technique T1566, which covers social engineering tactics, as the malicious scripts could be crafted to appear legitimate and deceive users into executing harmful actions.
The mitigation strategy for CVE-2026-1911 requires immediate attention from WordPress administrators and security teams. The primary solution involves upgrading the Twitter Feeds plugin to a version that addresses the input sanitization and output escaping deficiencies. Organizations should implement comprehensive patch management procedures to ensure all vulnerable plugins are updated promptly. Additionally, security teams should consider implementing input validation measures at the web application firewall level and monitor for any suspicious activity related to the Twitter Feeds plugin. Regular security audits should be conducted to identify similar vulnerabilities in other plugins, as this issue demonstrates how seemingly minor input handling flaws can create significant security risks. The vulnerability also underscores the importance of least privilege principles, where user permissions should be carefully managed to limit the potential impact of such attacks. Organizations should also implement proper output encoding and content security policies to provide defense-in-depth against similar cross-site scripting vulnerabilities.