vulnerability
WordPress Plugin: hal: CVE-2021-39345: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:N/AC:H/Au:S/C:N/I:P/A:N) | Oct 14, 2021 | May 15, 2025 | May 4, 2026 |
Severity
2
CVSS
(AV:N/AC:H/Au:S/C:N/I:P/A:N)
Published
Oct 14, 2021
Added
May 15, 2025
Modified
May 4, 2026
Description
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.
Solution
hal-plugin-cve-2021-39345
References
Rapid7 Labs
2026 Global Threat Landscape Report
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