Medium severity6.1NVD Advisory· Published Jul 9, 2020· Updated Jun 17, 2026

CVE-2020-15299

Description

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.

Affected products

King Theme/Kingcomposer
cpe:2.3:a:king-theme:kingcomposer:*:*:*:*:*:wordpress:*:*
Range: <=2.9.4
WordPress/KingComposer plugindescription
WordPress/Kingcomposerllm-fuzzy
Range: <=2.9.4
Package: https://wordpress.org/plugins/kingcomposer

Patches

Vulnerability mechanics

References

www.wordfence.com/blog/2020/07/xss-flaw-impacting-100000-sites-patched-in-kingcomposer/nvdExploitThird Party Advisory

News mentions

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cvss	0.397
epss	0.038
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000