CVE-2026-77263 Details
Description
The iubenda | All-in-one Compliance for GDPR / CCPA Cookie Consent + more plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content in all versions up to, and including, 3.13.4 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 works by embedding KSES-allowed markup such as abbr title attributes and HTML comments in a submitted comment so that the global strtr() substitution strips substrings from an inert tag, mutating it into an executable element such as an img onerror handler that runs in the WordPress origin for any visitor, including logged-in administrators.
A stored cross-site scripting vulnerability has been identified in the Iubenda WordPress plugin, specifically in the 'All-in-one Compliance for GDPR / CCPA Cookie Consent + more' version 3.13.4 and earlier. This vulnerability arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts into pages. The injected scripts execute when a user accesses the affected page. Exploitation involves embedding KSES-allowed markup, such as 'abbr' title attributes and HTML comments, into a submitted comment. The global 'strtr()' function then transforms the comment into an executable element, like an 'img' tag with an 'onerror' handler, which runs in the WordPress origin for any visitor, including logged-in administrators.
Users can update to Iubenda WordPress plugin version 3.13.5, which addresses this vulnerability by improving the handling of cookie-block markers and removing outdated Google AdSense processing that could be exploited.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 5, 2026CISA-ADP
Assessed Sep 8, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| iubenda | <= 3.13.4 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 8, 2026 | CVE Modified | CISA-ADP |
| Sep 5, 2026 | New CVE Received | [email protected] |