CVE-2026-15452 in Social Photo Feed Plugin
Summary
by MITRE • 08/05/2026
The Smash Balloon Social Photo Feed – Easy Social Feeds Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via REQUEST_URI Query String in all versions up to, and including, 6.11.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 08/06/2026
The Smash Balloon Social Photo Feed plugin for WordPress represents a widely used tool for displaying social media content on websites, yet it harbors a critical reflected cross-site scripting vulnerability that affects all versions up to and including 6.11.3. This security flaw resides in the plugin's handling of the REQUEST_URI query string parameter, where inadequate input sanitization and output escaping mechanisms fail to properly filter malicious user input before it gets rendered in web pages. The vulnerability stems from the plugin's failure to implement proper validation and encoding of user-supplied data, creating an attack surface that unauthenticated adversaries can exploit without requiring any privileged access or authentication credentials.
The technical nature of this vulnerability places it squarely within the scope of CWE-79, which defines Cross-Site Scripting as a weakness where untrusted data is sent to a web browser without proper validation or encoding. The reflected nature of the vulnerability means that malicious scripts are reflected off the web server back to the victim's browser, typically through crafted URLs that contain malicious payloads in the REQUEST_URI parameter. Attackers can construct specially formatted links containing script code that gets executed when users navigate to these malicious URLs, making this a prime target for social engineering attacks where victims are tricked into clicking on seemingly legitimate links that contain embedded malicious content.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the capability to perform various malicious activities including session hijacking, credential theft, and redirection to malicious sites. When users click on links containing the crafted payloads, the injected scripts can access sensitive information from the user's browser session, potentially compromising authentication tokens or other session-specific data. The vulnerability also enables attackers to modify the content displayed on the affected WordPress site, allowing them to inject malicious advertisements or redirect users to phishing sites that appear legitimate to unsuspecting visitors.
Mitigation strategies for this vulnerability require immediate attention from system administrators and security teams responsible for maintaining WordPress installations. The most effective immediate solution involves upgrading to a patched version of the plugin where input sanitization and output escaping mechanisms have been properly implemented to prevent malicious data from being executed. Organizations should also implement web application firewalls that can detect and block suspicious REQUEST_URI parameters, though this approach represents a secondary defense rather than a complete solution. Additionally, security practices such as monitoring for unusual traffic patterns and implementing content security policies can help reduce the risk of exploitation. The vulnerability highlights the importance of proper input validation and output encoding practices in web applications, aligning with ATT&CK technique T1203 which covers credential harvesting through various attack vectors including XSS vulnerabilities that can be leveraged to steal authentication tokens from user sessions.