A reflected Cross-Site Scripting (XSS) Vulnerability in the KingComposer plugin through…
Priority MEDIUM 57CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
A reflected Cross-Site Scripting (XSS) Vulnerability in the KingComposer plugin through 2.9.4 for WordPress allows remote attackers to trick a victim into submitting an install_online_preset AJAX request containing base64-encoded JavaScript (in the kc-online-preset-data POST parameter) that is executed in the victim's browser.
Why it matters now
EPSS 0.4696 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:king-theme:kingcomposer:*:*:*:*:*:wordpress:*:* | up to 2.9.4 | Vulnerable | King-Theme |
- cpe:2.3:a:king-theme:kingcomposer:*:*:*:*:*:wordpress:*:* Versions up to 2.9.4 Vulnerable ·King-Theme
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15299
- 2026-10-03 Alias added: GHSA-388v-6f9f-263v
References
More King-Theme Kingcomposer vulnerabilities
- TI-2022-00106 Page Builder KingComposer <= 2.9.6 - Open Redirect CVSS 3.1MEDIUM 6.1
- TI-2019-07282 The kingcomposer plugin 2.7.6 for WordPress has wp-admin/admin.php?page=kc-mapper id XSS. CVSS 3.0MEDIUM 6.1
- TI-2021-07326 KingComposer <= 2.9.6 - Subscriber+ Stored Cross-Site Scripting CVSS 3.1MEDIUM 5.4
Sources
- CVE-2020-15299 · CVE Program
- CVE-2020-15299 · NVD
- FIRST EPSS
- GHSA-388v-6f9f-263v · 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