Real Cookie Banner: GDPR & ePrivacy Cookie Consent <= 5.3.0 - Unauthenticated Stored Cross-Site Scripting via Comment Content
- ID
- WPSEC-2026-0281
- Plugin
- Real Cookie Banner: GDPR & ePrivacy Cookie Consent (real-cookie-banner)
- Affected
- from 3.4.13 before 5.3.6
- Remediation
- Update to 5.3.6 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin Medium · Affected versions Low among sites WPSec scans, 2026-10-22
- Attack surface
- Real Cookie Banner: GDPR & ePrivacy Cookie Consent on WPSec AttackSurface
- Fix released
- Published
Also published later by Wordfence as CVE-2026-92977, on 2026-10-02.
Description
The Real Cookie Banner: GDPR & ePrivacy Cookie Consent plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions 3.4.13 up to, and including, 5.3.0. When the content blocker is active (the default once the cookie banner is enabled), the plugin post-processes every front-end page and strips its internal invisible marker attributes with a pattern that can also consume the closing quote of a neighbouring attribute value. Inert user-supplied text inside an HTML attribute, such as a title attribute in a published visitor comment, can thereby be turned into executable markup. This makes it possible for unauthenticated attackers on sites with open comments to inject arbitrary web scripts that execute whenever a user accesses the affected page.
References
- https://wpsec.com/vuln/WPSEC-2026-0281/
- https://plugins.svn.wordpress.org/real-cookie-banner/tags/5.3.6/
- https://wordpress.org/plugins/real-cookie-banner/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
This advisory as JSON or Markdown · All advisories: JSON, RSS