Name: CVE-2021-39345: Improper Neutralization of Input During Web Page Generation
Creator: Rapid7
Published: 2021-10-15T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-39345, CWE-79, CVSS 5.5, EPSS 0.00409

The HAL WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via several parameters found in the ~/wp-hal.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 2.1.1. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

CVSS Details

CVSS 3.1 Base Score: 5.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Hal Plugin	—	Update hal plugin to version 2.2, or a newer patched version	May 15, 2025	Oct 14, 2021

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CVSS Details

Covered by Rapid7

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