Threat intelligence

Slim SEO <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via slim_seo_breadcrumbs Shortcode

CVE-2025-4611 · slim-seo

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Slim Seo at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Slim SEO <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via slim_seo_breadcrumbs Shortcode
Affected software: slim-seo(Plugin)
Affected versions: ≤ 4.5.3
Authentication: Authenticated (see advisory title)
Vulnerability type: Cross-site scripting
CVE: CVE-2025-4611
Published: 20 May 2025
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory 6318a1cf-716f-450c-a1c2-497de8095daa). Methodology and redistribution notes

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