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Vulnerability record · CVE-2026-77263 · published 5 September 2026

CVE-2026-77263: Cross-site scripting vulnerability

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.

7.2 CVSS 3.1 High EPSS 0.43% · top 65.4% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
8 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/iubenda-cookie-law-solution/trunk/iubenda-cookie-class/iubenda.class.php#L381
https://plugins.trac.wordpress.org/browser/iubenda-cookie-law-solution/trunk/iubenda-cookie-class/iubenda.class.php#L941
https://plugins.trac.wordpress.org/browser/iubenda-cookie-law-solution/trunk/iubenda_cookie_solution.php#L834
https://plugins.trac.wordpress.org/browser/iubenda-cookie-law-solution/trunk/iubenda_cookie_solution.php#L857
https://plugins.trac.wordpress.org/changeset/3675630/iubenda-cookie-law-solution/trunk/iubenda-cookie-class/iubenda.clas
https://plugins.trac.wordpress.org/changeset?old_path=%2Fiubenda-cookie-law-solution/tags/3.13.4&new_path=%2Fiubenda-coo
https://plugins.trac.wordpress.org/changeset?reponame=&new=3675630%40iubenda-cookie-law-solution%2Ftags%2F3.13.5&old=366
https://www.wordfence.com/threat-intel/vulnerabilities/id/f8d18aaa-c8f4-4688-841d-2a77b71b60b0?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-77263), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.