CVE-2026-97339

Complianz GDPR/CCPA Cookie Consent Banner <= 7.5.5 - Unauthenticated Stored Cross-Site Scripting via Comment Content via yotu-wp Cookie-Blocker Filter

2026-10-15 15:15
theviper17y

Strategic Overview

Status
Patched in 7.5.6
Affected Plugin
Complianz GDPR/CCPA Cookie Consent Banner
Affected Version
<= 7.5.5
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2026-97339
View all Complianz GDPR/CCPA Cookie Consent Banner vulnerabilities

At a glance

CVE-2026-97339 is a high-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Complianz GDPR/CCPA Cookie Consent Banner WordPress plugin, affecting versions <= 7.5.5. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 7.5.6; sites on affected versions should update now. Disclosed October 2026, reported by theviper17y.

Vulnerability Overview

The Complianz GDPR/CCPA Cookie Consent Banner plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via yotu-wp Cookie-Blocker Filter in all versions up to, and including, 7.5.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to 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 because the payload uses only allow-listed tags and hides executable tokens inside quoted attribute values as plain text; the XSS is only realized when Complianz's own output-buffer filter performs str_replace() rewrites that break out of the attribute context, and requires the comment to be approved before it executes for visitors.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Complianz GDPR/CCPA Cookie Consent Banner <= 7.5.5 carries this weakness at str_replace(), and reaching it takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Complianz GDPR/CCPA Cookie Consent Banner the fix is 7.5.6: builds <= 7.5.5 are affected, anything from 7.5.6 onward is not.

Remediation

Update to version 7.5.6, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Complianz GDPR/CCPA Cookie Consent Banner 7.5.6 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-97339https://www.wordfence.com/threat-intel/vulnerabilities/id/3c12e65c-eedf-4fc2-977a-7a07219ee1c2https://nvd.nist.gov/vuln/detail/CVE-2026-97339

Related records

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