The rexCrawler plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'url' and 'regex' parameters in the search-pattern tester page in all versions up to, and including, 1.0.15 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick an administrator into performing an action such as clicking on a link. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_t…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_t…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.ph…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.ph…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/2a17f466-bc4b-4668-8f…
security@wordfence.com