The Debloat – Remove Unused CSS, Optimize JS plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 1.3.0 via the 's' parameter parameter. This makes it possible for authenticated attackers, with administrator-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. Exploitation requires that the site administrator has enabled the Optimize CSS feature (with the default Inline Google Fonts option active), but once that condition is met the attack is trivially triggered by an unauthenticated visitor with a single crafted GET request to the public search URL.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 10
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/inc/file-cache.ph…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/inc/minifier.php#…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/inc/minifier.php#…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/inc/optimize-css/…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/inc/optimize-css/…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/inc/process.php#L…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/vendor/matthiasmu…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/debloat/tags/1.3.0/vendor/matthiasmu…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?reponame=&old=3735830%40debloat&ne…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/a8c9b57b-d60d-4197-a9…
security@wordfence.com