CVE-2026-57399 PUBLISHED

WordPress Proxy & VPN Blocker plugin <= 3.5.8 - Cross Site Scripting (XSS) vulnerability

Assigner: Patchstack
Reserved: 24.06.2026 Published: 13.07.2026 Updated: 13.07.2026

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Proxy & VPN Blocker Proxy & VPN Blocker proxy-vpn-blocker allows Stored XSS.This issue affects Proxy & VPN Blocker: from n/a through <= 3.5.8.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
CVSS Score: 7.1

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Proxy & VPN Blocker
Product	Proxy & VPN Blocker
Versions	Default: unaffected affected from 0 to 3.5.8 (incl.)

Credits

Peng Zhou | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/Wordpress/Plugin/proxy-vpn-blocker/vulnerability/wordpress-proxy-vpn-blocker-plugin-3-5-8-cross-site-scripting-xss-vulnerability?_s_id=cve

Problem Types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

Stored XSS