CVE-2026-84219 Kirki 6.2.1 - 6.2.5 - Unauthenticated Stored XSS via HTML Entity Decoding
Unauthenticated attackers can inject JavaScript via comments that executes in admin sessions, potentially leading to site takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-84219?
CVE-2026-84219 is a high-severity cross-site scripting vulnerability in Unknown Kirki, published on 6 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Kirki WordPress plugin before 6.3.0 does not hold back every spelling of the HTML entities it decodes when rendering, allowing unauthenticated users to store JavaScript in a comment which then runs in the session of anyone viewing a page that displays it, including an administrator, and on every page of the site when its header or footer is built to show comments.
Weakness: CWE-79
Which versions are affected by CVE-2026-84219?
How do I fix CVE-2026-84219?
No fix has been published for CVE-2026-84219 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-2026-84219 being exploited?
There is no known exploitation of CVE-2026-84219 in the wild and no public exploit code.
Sources
Also known as GHSA-5jh7-hrj4-qc2f.