Description

The Easy Image Collage plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'grid[properties][borderColor]' and 'grid[images][N][attachment_url]' Parameters in all versions up to, and including, 1.13.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Because the data is stored via update_post_meta() rather than wp_insert_post() post content, WordPress's unfiltered_html restriction does not apply, meaning Authors cannot be blocked from this attack path by capability controls alone.

Weaknesses 1

References 6

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-image-collage/tags/1.13.6/helpers/ajax.php#L16
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-image-collage/tags/1.13.6/helpers/layouts.php#L261
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-image-collage/tags/1.13.6/helpers/models/grid.php#L39
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-image-collage/tags/1.13.6/helpers/shortcode.php#L42
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?old_path=easy-image-collage/tags/1.13.6&new_path=easy-image-collage/tags/2.0.0
• wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/4feaad82-f94e-49f5-8e8b-67ba220b1c71?source=cve

Remediation