CVE-2026-77263
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
The iubenda | All-in-one Compliance plugin for WordPress up to version 3.13.4 is vulnerable to Stored Cross-Site Scripting via Comment Content due to insufficient input sanitization and output escaping. Unauthenticated attackers can inject arbitrary web scripts that execute when a user accesses an injected page. The exploit works by embedding KSES-allowed markup such as abbr title attributes and HTML comments so that the global strtr() substitution mutates an inert tag into an executable element like an img onerror handler.
Risk Assessment
The risk includes execution of malicious scripts in the context of any visitor's browser, including administrators, potentially leading to session hijacking, data theft, or malware distribution. The attack does not require authentication.
Recommendation
Immediately update the iubenda plugin to the latest patched version. Also consider restricting comment submission or implementing additional protections such as a Web Application Firewall.
Other vulnerabilities in iubenda | All-in-one Compliance
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS