WordPress PrePost SEO plugin versions 3.0 and below suffer from a persistent cross site scripting vulnerability.
advisories | CVE-2023-2029
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
