XSS in Larsdrasmussen Rexcrawler
CVE-2026-2277
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (16.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Larsdrasmussen Rexcrawler — versions 0
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/2a17f466-bc4b-4668-8ff9-e8b31…
- plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php
- plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php
- plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php
- plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php
Frequently asked questions
- What is CVE-2026-2277?
- CVE-2026-2277 is a medium-severity vulnerability in Larsdrasmussen Rexcrawler, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-21.
- How severe is CVE-2026-2277?
- Medium severity. CVSS v3 base score is 6.1 out of 10.