CVE-2024-4487: The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG uploads in versions up to, and including, 2.0.45 due to insufficient input sanitization and output escap

medium Affects blocksy-companion (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published 2024-05-14; advisory modified 2026-06-17.

The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG uploads in versions up to, and including, 2.0.45 due to insufficient input sanitization and output escap

Package: blocksy-companion (WordPress plugin) WordPress
Affected versions: <2.0.46
Fixed in: 2.0.46
Severity: medium CVSS 6.4
Exploitation: not on CISA KEV · EPSS 0% (37.1th percentile)
Published: 2024-05-14
Source: nvd

References

CWE-79

NVD record blocksy-companion (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.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

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

Install docs How findings are ranked

Related advisories

CVE-2023-1911 medium The Blocksy Companion WordPress plugin before 1.8.82 does not ensure that posts to be acce same package: blocksy-companion (WordPress plugin)
CVE-2024-2392 medium The Blocksy Companion plugin for WordPress is vulnerable to Stored Cross-Site Scripting vi same package: blocksy-companion (WordPress plugin)
CVE-2020-11023 KEV medium Potential XSS vulnerability in jQuery same weakness: CWE-79
CVE-2019-9978 KEV medium The social-warfare plugin before 3.5.3 for WordPress has stored XSS via the wp-admin/admin same weakness: CWE-79
CVE-2020-11022 medium Potential XSS vulnerability in jQuery same weakness: CWE-79
CVE-2022-3562 medium Cross-site Scripting in librenms/librenms same weakness: CWE-79