CVE-2026-97640 Cross-site scripting in WPConsent – Cookie Banner & Cookie Consent for Privacy Compliance (GDPR / CCPA / EU Compliance Cookie Notice)
Unauthenticated attackers can inject arbitrary scripts via comments in WPConsent plugin if Script Blocking is enabled, leading to stored XSS.
- 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-2026-97640?
CVE-2026-97640 is a high-severity cross-site scripting vulnerability in smub WPConsent – Cookie Banner & Cookie Consent for Privacy Compliance (GDPR / CCPA / EU Compliance Cookie Notice), published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The WPConsent – Cookie Banner & Cookie Consent for Privacy Compliance (GDPR / CCPA / EU Compliance Cookie Notice) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Simple HTML DOM Parser Noise-Key Restoration (mXSS) in all versions up to, and including, 1.1.9 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. This requires the Script Blocking feature to be enabled, and the exploit chain depends on an attacker submitting two coordinated comments — one embedding event-handler syntax inside an allowed <code> element and one placing the deterministic ___noise___ restoration key inside an allowed <abbr title=""> attribute — with the key offset confirmable via an unauthenticated wpconsent_debug=1 request.
Weakness: CWE-79
Which versions are affected by CVE-2026-97640?
How do I fix CVE-2026-97640?
No fix has been published for CVE-2026-97640 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-2026-97640 being exploited?
There is no known exploitation of CVE-2026-97640 in the wild and no public exploit code.
Sources
Also known as GHSA-4m2x-3wp6-xmxj.