CVE-2026-35164 Ajax30 CVE debrief

Who should care

Defenders responsible for Brave CMS deployments should assess exposure and apply the vendor-provided patch. This includes administrators, security teams, and developers who manage or use the affected versions of Brave CMS.

Why it matters

CVE-2026-35164 is an unrestricted file upload vulnerability in Brave CMS's CKEditor functionality, allowing authenticated users to upload executable PHP scripts and potentially gain Remote Code Execution. Defenders should prioritize verifying exposure and applying the vendor-provided patch.

• Potential Remote Code Execution
• Elevation of privileges for authenticated users
• Possible compromise of the CMS and underlying systems
• Need for verification of exposure and application of the vendor-provided patch

Technical summary

The vulnerability exists in the ckupload method of the CkEditorController.php file in Brave CMS versions prior to 2.0.6. An authenticated user can upload executable PHP scripts, potentially leading to Remote Code Execution. This vulnerability is fixed in 2.0.6. The vulnerability allows for potential Remote Code Execution. Defenders should prioritize verifying exposure and applying the vendor-provided patch. The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 8.8 and the affected versions of Brave CMS.

Defensive priority

Defenders should prioritize verifying exposure and applying the vendor-provided patch, as the vulnerability allows for potential Remote Code Execution.

Recommended defensive actions

• Verify exposure by checking if the system uses a vulnerable version of Brave CMS and if the CKEditor functionality is enabled.
• Apply the vendor-provided patch by upgrading to Brave CMS version 2.0.6 or later.
• Restrict file uploads to only allow specific, validated file types.
• Monitor for suspicious activity, such as unexpected file uploads or execution of PHP scripts.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 8.8 and the affected versions of Brave CMS. The vendor has released a patch in version 2.0.6. The vulnerability exists in the ckupload method of the CkEditorController.php file in Brave CMS versions prior to 2.0.6. An authenticated user can upload executable PHP scripts, potentially leading to Remote Code Execution. Defenders should prioritize verifying exposure and applying the vendor-provided patch. The vulnerability allows for potential

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.