CVE-2025-61181 identifies a critical arbitrary file upload vulnerability in daicuocms version 1.3.13, a content management system. The vulnerability resides in the image upload functionality, which fails to properly validate or restrict the types of files being uploaded. This flaw enables an attacker to upload malicious files, such as web shells or scripts, that can be executed on the server. Exploiting this vulnerability can lead to remote code execution, unauthorized access, data theft, or complete system compromise. The vulnerability does not require authentication or user interaction, increasing its risk profile. Although no CVSS score or patch is currently available, the vulnerability was published on October 21, 2025, with the reservation date on September 26, 2025. No known exploits have been reported in the wild yet, but the potential impact is significant. The lack of patch links suggests that vendors or maintainers have not yet released a fix, emphasizing the need for immediate mitigation efforts. The vulnerability affects all installations of daicuocms version 1.3.13 that use the vulnerable image upload feature, which is likely common in deployments relying on this CMS for web content management.

For European organizations, this vulnerability poses a substantial risk, particularly for those using daicuocms 1.3.13 to manage public-facing websites or intranet portals. Successful exploitation can lead to unauthorized access to sensitive data, defacement of websites, disruption of services, or full server takeover. This can result in reputational damage, regulatory penalties under GDPR due to data breaches, and operational downtime. Organizations in sectors such as government, finance, healthcare, and media, which often rely on CMS platforms, may face increased risk. The arbitrary file upload can also serve as a foothold for further lateral movement within networks, amplifying the threat. Given the absence of patches and public exploits, attackers may develop and deploy exploits rapidly, increasing urgency for European entities to act proactively.

1. Immediately audit all daicuocms installations to identify version 1.3.13 deployments and disable the image upload feature if possible until a patch is available. 2. Implement strict server-side validation of uploaded files, restricting allowed file types to safe image formats (e.g., JPEG, PNG) and verifying MIME types and file signatures. 3. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious upload attempts or payloads. 4. Isolate upload directories with minimal permissions and prevent execution of uploaded files by configuring web server settings (e.g., disabling script execution in upload folders). 5. Monitor logs for unusual upload activity or access patterns indicative of exploitation attempts. 6. Prepare for rapid patch deployment once an official fix is released by the vendor. 7. Educate development and operations teams about secure file upload practices and the risks of arbitrary file uploads. 8. Consider deploying intrusion detection/prevention systems (IDS/IPS) tuned for web shell signatures and anomalous behavior.