CVE-2026-97339 complianz CVE debrief

Who should care

Defenders responsible for WordPress installations with the Complianz GDPR/CCPA Cookie Consent Banner plugin should assess exposure and prioritize updating the plugin to a version that fixes this vulnerability.

Why it matters

The Complianz GDPR/CCPA Cookie Consent Banner plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content. Defenders should prioritize updating the plugin to a version that fixes this vulnerability and review comments for suspicious activity.

• Unauthenticated attackers can inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
• The exploit bypasses WordPress's wp_kses comment sanitization, making it difficult to detect and prevent.
• Defenders need to verify the version of the Complianz GDPR/CCPA Cookie Consent Banner plugin and update it to a fixed version.
• The vulnerability requires the comment to be approved before it executes for visitors, which may limit its impact.

Technical summary

The Complianz GDPR/CCPA Cookie Consent Banner plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content due to insufficient input sanitization and output escaping. The exploit bypasses WordPress's wp_kses comment sanitization and requires the comment to be approved before it executes for visitors. The vulnerability allows unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The plugin's vulnerability is specifically found in the yotu-wp Cookie-Blocker Filter.

Defensive priority

Defenders should prioritize updating the Complianz GDPR/CCPA Cookie Consent Banner plugin to a version that fixes this vulnerability.

Recommended defensive actions

• Update the Complianz GDPR/CCPA Cookie Consent Banner plugin to a version that fixes this vulnerability.
• Review and monitor comments for suspicious activity.
• Implement additional security measures to prevent cross-site scripting attacks.
• Verify the version of the Complianz GDPR/CCPA Cookie Consent Banner plugin and update it to a fixed version.
• 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 vulnerability was discovered in the Complianz GDPR/CCPA Cookie Consent Banner plugin for WordPress, specifically in the yotu-wp Cookie-Blocker Filter. The exploit requires the comment to be approved before it executes for visitors.

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.