Leaky Paywall <= 4.16.5 Authenticated Stored Cross-Site Scripting

2021-10-18 00:00

Thinkland Security Team

Strategic Overview

Status

Patched in 4.16.6

Affected PluginLeaky Paywall

Affected Version<= 4.16.5

CVSS5.5Medium

CVECVE-2021-39357

View all Leaky Paywall vulnerabilities

Vulnerability Overview

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.

Technical Analysis

REMEDIATION: Update to version 4.16.6, or a newer patched version --- IDENTIFIER: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

External References

https://www.cve.org/CVERecord?id=CVE-2021-39357 https://www.wordfence.com/threat-intel/vulnerabilities/id/2ad7fd59-e4a2-46e7-9232-d76255a6b0b4

CVSS Vector

5.5

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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