XSS in King-Theme Kingcomposer

CVE-2020-15299

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.470 (98.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-15299?
CVE-2020-15299 is a medium-severity vulnerability in King-Theme Kingcomposer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-07-09.
How severe is CVE-2020-15299?
Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-15299 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.