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CVE-2026-13157 is an unrestricted file upload vulnerability in the Demo Import WordPress plugin through version 1.1.3. During demo-content import, the plugin disables or bypasses WordPress file-type validation and does not properly verify the type of uploaded files. As a result, a high-privilege authenticated user, such as an Administrator by default, including non-super-admin site administrators in multisite deployments, can upload executable PHP content into the WordPress uploads directory. Because the uploaded file can be interpreted by the server as executable code, the flaw can be leveraged to achieve arbitrary code execution within the context of the affected WordPress site.
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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.