CVE-2026-84223 Kirki 6.0.0 - 6.3.0 - Author+ Stored XSS via Unsanitized SVG Upload
Authors can upload malicious SVG files containing JavaScript, leading to stored XSS and potential session hijacking for site visitors.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-84223?
CVE-2026-84223 is a medium-severity cross-site scripting vulnerability in Unknown Kirki, published on 20 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Kirki WordPress plugin before 6.3.1 does not sanitize uploaded SVG files while making them uploadable site-wide, allowing users with author-level access and above to upload a file containing JavaScript which is then served from the site's own origin and runs in the session of anyone who opens it.
Weakness: CWE-79
Which versions are affected by CVE-2026-84223?
How do I fix CVE-2026-84223?
No fix has been published for CVE-2026-84223 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-2026-84223 being exploited?
There is no known exploitation of CVE-2026-84223 in the wild and no public exploit code.
Sources
Also known as GHSA-96mm-r72j-4pv6.