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Stored Cross-Site Scripting in the EmbedPress WordPress plugin (all versions through 4.5.3) allows authenticated attackers with contributor-level access to persistently inject arbitrary JavaScript via the block 'url' attribute, executing in the browsers of any user who visits an affected page. The vulnerability originates in insufficient sanitization within EmbedPressBlockRenderer.php and Helper.php, as confirmed by Wordfence and traceable to specific lines in the plugin's source repository. No public exploit code or CISA KEV listing has been identified at time of analysis, but the Scope:Changed CVSS designation reflects that successful exploitation affects resources beyond the vulnerable component itself - namely, victim browser sessions.
Stored Cross-Site Scripting in the EmbedPress WordPress plugin (all versions through 4.5.3) allows authenticated attackers with contributor-level access to persistently inject arbitrary JavaScript via the block 'url' attribute, executing in the browsers of any user who visits an affected page. The vulnerability originates in insufficient sanitization within EmbedPressBlockRenderer.php and Helper.php, as confirmed by Wordfence and traceable to specific lines in the plugin's source repository. No public exploit code or CISA KEV listing has been identified at time of analysis, but the Scope:Changed CVSS designation reflects that successful exploitation affects resources beyond the vulnerable component itself - namely, victim browser sessions.