CVE-2026-2277

rexCrawler <= 1.0.15 - Reflected Cross-Site Scripting via 'url' and 'regex' Parameters

Published Mar 21, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed

Description

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.

Analysis

Technical impact

The vulnerability is a reflected XSS that allows attackers to inject scripts through the 'url' and 'regex' parameters on the admin_regex_test.php page in the rexCrawler plugin. This flaw affects WordPress multisite installations and those with unfiltered_html disabled, enabling execution of arbitrary scripts in admin pages after an administrator clicks a crafted link.

Affected Systems

The affected product is the rexCrawler WordPress plugin by larsdrasmussen, with all versions up to and including 1.0.15 impacted. Administrators should check whether their site runs any of these unstable releases and ensure they are on a supported version.

Risk and Exploitability

The CVSS base score is 6.1, indicating medium severity. No EPSS data is provided and the vulnerability is not listed in the CISA KEV catalog. Exploitation requires an attacker to prompt a legitimate administrator to access the vulnerable endpoint, typically through social engineering or phishing with a malicious link, after which the unsanitized parameters allow injection of malicious JavaScript.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

larsdrasmussen

rexCrawler

unaffected

Version	Status	Constraints
`0`	affected	≤ 1.0.15

No data.

Vendor Product Versions

Larsdrasmussen

Rexcrawler

Version	Status	Scheme	Platform
`[0,1.0.15]`	affected	semver	—

Wordpress

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update the rexCrawler plugin to a version newer than 1.0.15.
If upgrading is not possible, restrict or remove access to the admin_regex_test.php page so that only trusted administrators can use it.
Regularly audit the site for other XSS‑related issues and ensure input sanitization and output escaping are correctly applied.

Generated by OpenCVE AI on March 21, 2026 at 06:40 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.281% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php#L25
https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php#L29
https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php#L25
https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php#L29
https://www.wordfence.com/threat-intel/vulnerabilities/id/2a17f466-bc4b-4668-8ff9-e8b316e3b5b7?source=cve

History

Mar 23, 2026 4:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mar 23, 2026 10:00 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Larsdrasmussen Larsdrasmussen rexcrawler Wordpress Wordpress wordpress
Vendors & Products		Larsdrasmussen Larsdrasmussen rexcrawler Wordpress Wordpress wordpress

Mar 21, 2026 5:30 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		rexCrawler <= 1.0.15 - Reflected Cross-Site Scripting via 'url' and 'regex' Parameters
Weaknesses		CWE-79
References		https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php#L25 https://plugins.trac.wordpress.org/browser/rexcrawler/tags/1.0.15/admin_regex_test.php#L29 https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php#L25 https://plugins.trac.wordpress.org/browser/rexcrawler/trunk/admin_regex_test.php#L29 https://www.wordfence.com/threat-intel/vulnerabilities/id/2a17f466-bc4b-4668-8ff9-e8b316e3b5b7?source=cve
Metrics		cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}`