CVE-2024-7302 in Blog2Social Plugin
Summary
by MITRE • 08/01/2024
The Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 3gp2 file uploads in all versions up to, and including, 7.5.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the 3gp2 file.
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Analysis
by VulDB Data Team • 03/16/2025
The vulnerability identified as CVE-2024-7302 affects the Blog2Social plugin for WordPress, specifically targeting versions up to and including 7.5.4. This plugin facilitates social media auto-posting and scheduling functionality, making it a critical component in many WordPress installations. The vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's file upload handling process, particularly concerning 3gp2 media file uploads. Attackers exploiting this weakness can leverage their authenticated access to inject malicious scripts that persist within the system, creating a stored cross-site scripting threat that can affect other users who interact with the compromised content.
The technical flaw manifests in the plugin's failure to properly validate and sanitize user-supplied input during the 3gp2 file upload process. When an authenticated user with author-level privileges or higher uploads a malicious 3gp2 file, the system does not adequately filter or escape the file contents before storing them in the database. This insufficient sanitization creates a persistent XSS vulnerability where the malicious script remains embedded within the file metadata or content and executes whenever any user accesses the file through the WordPress interface. The vulnerability is particularly concerning because it requires only author-level privileges, which are commonly granted to content creators and editors in many WordPress installations, making the attack surface relatively broad.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, data exfiltration, and privilege escalation within the WordPress environment. Since the vulnerability affects authenticated users with author-level access and above, attackers can potentially leverage this to gain more extensive control over the WordPress site. The stored nature of the XSS means that the malicious code persists even after the initial upload, continuously affecting any user who accesses the compromised 3gp2 file. This makes the vulnerability particularly dangerous in multi-user environments where content creators frequently upload media files, as the attack can remain undetected for extended periods while continuously executing against unsuspecting users.
Security professionals should note this vulnerability aligns with CWE-79, which specifically addresses Cross-Site Scripting flaws in software applications. The attack vector follows patterns consistent with ATT&CK technique T1566.001, which involves the use of malicious files in phishing attacks, though in this case the malicious file is uploaded through legitimate plugin functionality rather than being delivered via email. The vulnerability demonstrates a critical gap in the plugin's input validation and output escaping mechanisms, highlighting the importance of implementing comprehensive security controls for all user-supplied data. Organizations should prioritize immediate remediation by updating to the latest plugin version or implementing temporary workarounds such as restricting upload privileges and monitoring file uploads. The vulnerability also underscores the necessity of regular security assessments and the importance of keeping all WordPress plugins updated to address known security flaws.