CVE-2020-36701: The Page Builder: KingComposer plugin for WordPress is vulnerable to Arbitrary File Uploads in versions up to, and including, 2.9.3 via the 'process_bulk_action' function in the 'kingcomposer/includes

high Affects kingcomposer (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2023-06-07; advisory modified 2026-06-17.

The Page Builder: KingComposer plugin for WordPress is vulnerable to Arbitrary File Uploads in versions up to, and including, 2.9.3 via the 'process_bulk_action' function in the 'kingcomposer/includes

Package: kingcomposer (WordPress plugin) WordPress
Affected versions: <=2.9.3
Fixed in: no fix recorded
Severity: high CVSS 8.8
Exploitation: not on CISA KEV · EPSS 2% (74.5th percentile)
Published: 2023-06-07
Source: nvd

References

CWE-434

NVD record kingcomposer (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden wordpress /var/www/html

# or, without Composer
pipx install phpwarden   &&   phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

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Related advisories

CVE-2020-15299 medium A reflected Cross-Site Scripting (XSS) Vulnerability in the KingComposer plugin through 2. same package: kingcomposer (WordPress plugin)
CVE-2022-0165 medium The Page Builder KingComposer WordPress plugin through 2.9.6 does not validate the id para same package: kingcomposer (WordPress plugin)
CVE-2019-9910 medium The kingcomposer plugin 2.7.6 for WordPress has wp-admin/admin.php?page=kc-mapper id XSS. same package: kingcomposer (WordPress plugin)
CVE-2020-36700 high The Page Builder: KingComposer plugin for WordPress is vulnerable to authorization bypass same package: kingcomposer (WordPress plugin)
CVE-2021-25048 medium The KingComposer WordPress plugin through 2.9.6 does not have authorisation, CSRF and sani same package: kingcomposer (WordPress plugin)
CVE-2020-25213 KEV critical Unauthenticated arbitrary file upload to RCE via the elFinder connector same weakness: CWE-434