Kirki 6.2.1 - 6.2.5 - Unauthenticated Stored XSS via HTML Entity Decoding
Priority LOW 35CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00373 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Kirki (Unknown): 6.3.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Kirki | 6.2.1 to before 6.3.0 | 6.3.0 | Patch available | CNA |
- Kirki VendorUnknown Affected 6.2.1 to before 6.3.0 Fixed in 6.3.0 Patch available CNA
Remediation
- Fix · CNA Kirki (Unknown) Fixed in 6.3.0
Timeline
- 2026-10-02 Threatist record created from CVE-2026-84219
- 2026-10-03 Alias added: GHSA-5jh7-hrj4-qc2f
References
Sources
- CVE-2026-84219 · CVE Program
- CVE-2026-84219 · NVD
- FIRST EPSS
- GHSA-5jh7-hrj4-qc2f · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences