CISA Flags Craft CMS Vulnerability CVE-2025-23209 Amid Active Attacks
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added the high-severity security flaw CVE-2025-23209 to its Known Exploited Vulnerabilities (KEV) catalog due to evidence of active exploitation. This vulnerability affects Craft CMS versions 4 and 5, with a CVSS score of 8.1. It was addressed by the project maintainers in late December 2024, in versions 4.13.8 and 5.5.8. 
Image courtesy of The Hacker News CISA stated, "Craft CMS contains a code injection vulnerability that allows for remote code execution as vulnerable versions have compromised user security keys." The affected versions include:
= 5.0.0-RC1 and < 5.5.5
= 4.0.0-RC1 and < 4.13.8
Organizations should review the CISA alert and apply patches by March 13, 2025. Craft CMS has also provided a GitHub advisory detailing mitigations, including the rotation of security keys if an update is not feasible.
Known Exploited Vulnerabilities Catalog
CISA maintains the authoritative source of vulnerabilities exploited in the wild to help organizations manage vulnerabilities effectively. The KEV catalog serves as a critical input to vulnerability management frameworks. Organizations can access the KEV catalog for insights on vulnerabilities like CVE-2025-23209. The catalog is available in multiple formats, including CSV and JSON. CVE-2025-23209 specifically indicates that Craft CMS has a code injection vulnerability, which allows remote code execution. It is critical for organizations to apply necessary mitigations as outlined by CISA and the National Vulnerability Database.
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