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CVE-2025-23209 is a remote code execution vulnerability affecting Craft CMS 4 and 5. Based on the provided content, vulnerable installations are Craft versions prior to 4.13.8 and 5.5.8, and exploitation is only possible where the application's security key has already been compromised. The supporting content further characterizes the issue as code injection via Twig server-side template injection, leading to RCE in affected Craft CMS instances.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in Craft CMS caused by Twig server-side template injection, affecting versions before 4.13.8 and 5.5.8 when the security key has been compromised.
A remote code execution vulnerability in Craft CMS described as occurring via a compromised security key.
A high-severity remote code execution vulnerability in Craft CMS via a compromised security key.
A Craft CMS (v4/v5) vulnerability added to CISA KEV due to active exploitation.
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.