CVE-2021-39357 Information

Description

The Leaky Paywall WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and sanitization via the ~/class.php file which allowed attackers with administrative user access to inject arbitrary web scripts in versions up to and including 4.16.5. This affects multi-site installations where unfiltered_html is disabled for administrators and sites where unfiltered_html is disabled.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Reference

https://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.md https://wordfence.com/vulnerability-advisories/#CVE-2021-39357 https://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.php

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

4.8