Tittle: WordPress Plugin PrePost SEO <= 3.0 - Admin + Stored Cross-Site Scripting References: CVE-2023-2029 Author: Taurus Omar Description: The plugin does not properly sanitize some of its settings, which could allow high-privilege users to perform Stored Cross-Site Scripting (XSS) attacks even when the unfiltered_html capability is disallowed (for example in multisite setup) Affects Plugins: PrePost SEO - No known fix - plugin closed Proof of Concept: 1. Add XSS payload to plugin's "Account API key" setting: "><iframe src="<svg onload=alert(4);>"> 2. Save and see XSS exploit. Classification: Type XSS OWASP top 10 A7: Cross-Site Scripting (XSS) CWE-79 wpScan: https://wpscan.com/vulnerability/4889ad5a-c8c4-4958-b176-64560490497b
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