CVE-2026-77263 Cross-site scripting in iubenda | All-in-one Compliance for GDPR / CCPA Cookie Consent + more

High 7.2 Published 5 Sep 2026 Updated 8 Sep 2026

Unauthenticated attackers can inject malicious scripts via comments, leading to code execution and potential account takeover for any visitor, including administrators.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-77263?

CVE-2026-77263 is a high-severity cross-site scripting vulnerability in iubenda | All-in-one Compliance for GDPR / CCPA Cookie Consent + more, published on 5 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-77263?

How do I fix CVE-2026-77263?

No fix has been published for CVE-2026-77263 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-77263 being exploited?

There is no known exploitation of CVE-2026-77263 in the wild and no public exploit code.

Sources

Also known as GHSA-3cj7-86g6-85rv.