7.5

CVE-2026-84219: unknown kirki Cross-site Scripting

CVSS: 7.5v3.1HighDeferred
Published 06-09-2026Last modified 06-09-2026
Open JSON

Vulnerability summary

CVE-2026-84219 is a high (CVSS 7.5) Cross-site Scripting vulnerability in unknown kirki. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.8% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 6.3.0.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.37%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 06-09-2026
    PublishedVulnerability first disclosed.
  2. 06-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

+0.16 pp

From 0.22% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.37%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Unknown1 product
Wordpress1 product
  • kirki≥ 6.2.1, ≤ 6.2.5 (fixed in 6.3.0)

2 vendors · 2 products

References

2 links