CVE-2025-6757 is a stored Cross-Site Scripting vulnerability identified in the Recent Posts Widget Extended plugin for WordPress, developed by themejunkie. The vulnerability affects all versions up to and including 2.0.2. It stems from insufficient input sanitization and output escaping on user-supplied attributes within the plugin's 'rpwe' shortcode functionality. Authenticated attackers with contributor-level permissions or higher can exploit this flaw by injecting arbitrary JavaScript code into pages rendered by the plugin. Because the malicious script is stored and executed whenever any user accesses the affected page, this can lead to persistent XSS attacks. The vulnerability does not require user interaction beyond page access but does require authenticated access with specific privileges. The CVSS 3.1 base score is 6.4, reflecting a medium severity level, with the vector indicating network attack vector, low attack complexity, privileges required, no user interaction, and a scope change. No public exploits have been reported yet, but the vulnerability poses a risk to WordPress sites using this plugin, especially those with multiple contributors. The root cause is the failure to properly neutralize input during web page generation, classified under CWE-79. Mitigation involves applying patches when available or implementing strict input validation and output escaping for the shortcode attributes.

The impact of CVE-2025-6757 primarily affects the confidentiality and integrity of affected WordPress sites. Successful exploitation allows an attacker with contributor-level access to inject persistent malicious scripts, which execute in the context of any user visiting the compromised page. This can lead to session hijacking, theft of sensitive information, unauthorized actions performed on behalf of users, defacement, or distribution of malware. While availability is not directly impacted, the reputational damage and potential data breaches can be significant. Organizations with multiple contributors or user-generated content are at higher risk. Since the vulnerability requires authenticated access, the threat is somewhat limited to insider threats or compromised contributor accounts. However, given WordPress's widespread use globally, the vulnerability could be leveraged in targeted attacks against websites that rely on this plugin for recent post displays.

To mitigate CVE-2025-6757, organizations should first verify if they use the Recent Posts Widget Extended plugin and identify the version in use. Immediate steps include: 1) Applying any official patches or updates released by themejunkie once available; 2) If no patch is available, temporarily disabling the plugin or removing the 'rpwe' shortcode usage to prevent exploitation; 3) Restricting contributor-level permissions and auditing user roles to minimize the risk of malicious input; 4) Implementing web application firewall (WAF) rules to detect and block suspicious script injections targeting the shortcode; 5) Employing input validation and output encoding on all user-supplied data within the plugin if custom modifications are possible; 6) Monitoring logs and user activity for signs of exploitation attempts; 7) Educating content contributors about secure content practices. These steps go beyond generic advice by focusing on role-based access control, shortcode usage review, and proactive monitoring specific to this vulnerability.