Yiiframework Yii Improper Protection of Alternate Path Vulnerability
Yii Framework contains an improper protection of alternate path vulnerability that may allow a remote attacker to execute arbitrary code. This vulnerability could affect other products that implement Yii, including—but not limited to—Craft CMS, as represented by CVE-2025-32432.
A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2025-05-23 under CISA BOD 22-01.
This is a Software Vulnerability (CWE-424) (CWE-424) vulnerability in Yiiframework Yii. Yii 2 before 2.0.52 mishandles the attaching of behavior that is defined by an __class array key, a CVE-2024-4990 regression, as exploited in the wild in February through April 2025. Exploitation requires remote network access, higher attack complexity, no authentication required, and no user interaction required.
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Phishing link
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Malicious file
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Server compromised
Probably yes if any of these apply:
Active exploitation documented in the wild. Threat-research write-up: https://sensepost.com/blog/2025/investigating-an-in-the-wild-campaign-using-rce-in-craftcms/
Manual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
References
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References