CVE-2026-61524 WebsiteBaker Org e.V. CVE debrief

Who should care

Defenders responsible for WebsiteBaker CMS installations, administrators with access to the module installation feature, and security teams monitoring for potential exploitation attempts should be aware of this vulnerability.

Why it matters

CVE-2026-61524 is a high-severity vulnerability in WebsiteBaker CMS that allows authenticated administrators to achieve remote code execution by uploading a crafted ZIP archive. Defenders should prioritize verifying exposure, assessing inventory, and monitoring for potential exploitation attempts.

• Remote code execution by unauthenticated users
• Potential for malicious code execution
• Need for verification of affected versions
• Priority for remediation and monitoring

Technical summary

The vulnerability exists in the module installation feature of WebsiteBaker CMS, allowing authenticated administrators to upload a crafted ZIP archive containing a PHP webshell, which can be executed by any unauthenticated user via direct HTTP request. The vulnerability allows for remote code execution and requires verification of affected versions and remediation steps. Defenders should prioritize verifying exposure, assessing inventory, and monitoring for potential exploitation attempts. Affected product context and defensive impact should be considered.

Defensive priority

Defenders should prioritize verifying exposure, assessing inventory, and monitoring for potential exploitation attempts.

Recommended defensive actions

• Verify exposure by assessing inventory of WebsiteBaker CMS installations
• Monitor for potential exploitation attempts
• Restrict access to the module installation feature
• Implement additional security controls for uploaded files
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions and remediation steps is limited. Defenders should verify exposure by assessing inventory of WebsiteBaker CMS installations, monitor for potential exploitation attempts, and restrict access to the module installation feature. The vulnerability allows authenticated administrators to upload a crafted ZIP archive containing a PHP webshell, which can be executed by any unauthenticated user via direct HTTP request. Evidence is

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.