CVE-2026-84223
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk15th percentile - higher than 15% of all known CVEs
Summary
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.
Risk Assessment
This enables a stored XSS attack in the site's context, which can lead to session theft or account takeover.
Recommendation
Update the Kirki plugin to version 6.3.1 or later.
Other vulnerabilities in Kirki WordPress plugin
See all- CVE-2026-18335Medium
The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Blind Server-Side Request Forgery in all versions up to, and including, 6.2.0 via the 'kirki_data' parameter. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
- CVE-2026-17037High
The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 6.2.0 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.
- CVE-2026-84222Medium
The Kirki WordPress plugin before 6.3.0 does not check whether the requester is allowed to read a post before rendering and returning its page content, allowing unauthenticated users to retrieve the content of pages that are not publicly available, such as private, draft, pending and trashed ones.
- CVE-2026-84219High
The Kirki WordPress plugin before 6.3.0 does not properly handle all HTML entities when rendering, allowing unauthenticated users to store JavaScript in a comment that executes in the session of anyone viewing the page, including an administrator, and on every page when the header or footer is built to show comments.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS