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CVE-2025-4611 is a stored cross-site scripting vulnerability in the Slim SEO – Fast & Automated WordPress SEO Plugin for WordPress. The issue affects all versions up to and including 4.5.3 and is caused by insufficient input sanitization and output escaping of user-supplied attributes in the plugin's slim_seo_breadcrumbs shortcode. An authenticated attacker with contributor-level privileges or higher can inject arbitrary JavaScript or other web script payloads into pages containing the crafted shortcode content. The payload is then stored and executed in victims' browsers when they access the affected page.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.