Vulnerability Details CVE-2021-39357
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 62.6%
CVSS Severity
CVSS v3 Score 5.5
CVSS v2 Score 3.5
Products affected by CVE-2021-39357
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cpe:2.3:a:zeen101:leaky_paywall:-
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cpe:2.3:a:zeen101:leaky_paywall:1.0.0
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cpe:2.3:a:zeen101:leaky_paywall:1.0.1
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cpe:2.3:a:zeen101:leaky_paywall:1.0.2
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cpe:2.3:a:zeen101:leaky_paywall:1.1.0
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cpe:2.3:a:zeen101:leaky_paywall:1.1.1
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cpe:2.3:a:zeen101:leaky_paywall:1.1.2
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cpe:2.3:a:zeen101:leaky_paywall:1.1.3
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cpe:2.3:a:zeen101:leaky_paywall:1.1.4
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cpe:2.3:a:zeen101:leaky_paywall:1.1.5
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cpe:2.3:a:zeen101:leaky_paywall:1.1.6
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cpe:2.3:a:zeen101:leaky_paywall:1.1.7
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cpe:2.3:a:zeen101:leaky_paywall:1.1.8
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cpe:2.3:a:zeen101:leaky_paywall:1.2.0
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cpe:2.3:a:zeen101:leaky_paywall:2.0.0
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cpe:2.3:a:zeen101:leaky_paywall:2.0.1
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cpe:2.3:a:zeen101:leaky_paywall:2.0.2
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cpe:2.3:a:zeen101:leaky_paywall:2.0.3
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cpe:2.3:a:zeen101:leaky_paywall:2.0.4
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cpe:2.3:a:zeen101:leaky_paywall:2.0.5
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cpe:2.3:a:zeen101:leaky_paywall:2.0.6
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cpe:2.3:a:zeen101:leaky_paywall:2.0.7
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cpe:2.3:a:zeen101:leaky_paywall:2.0.8
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cpe:2.3:a:zeen101:leaky_paywall:2.0.9
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cpe:2.3:a:zeen101:leaky_paywall:2.1.0
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cpe:2.3:a:zeen101:leaky_paywall:3.0.0
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cpe:2.3:a:zeen101:leaky_paywall:3.1.0
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cpe:2.3:a:zeen101:leaky_paywall:3.1.1
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cpe:2.3:a:zeen101:leaky_paywall:3.1.2
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cpe:2.3:a:zeen101:leaky_paywall:3.1.3
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cpe:2.3:a:zeen101:leaky_paywall:3.2.0
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cpe:2.3:a:zeen101:leaky_paywall:3.2.1
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cpe:2.3:a:zeen101:leaky_paywall:3.3.0
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cpe:2.3:a:zeen101:leaky_paywall:3.3.1
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cpe:2.3:a:zeen101:leaky_paywall:3.4.0
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cpe:2.3:a:zeen101:leaky_paywall:3.5.0
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cpe:2.3:a:zeen101:leaky_paywall:3.6.0
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cpe:2.3:a:zeen101:leaky_paywall:3.7.0
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cpe:2.3:a:zeen101:leaky_paywall:3.8.0
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cpe:2.3:a:zeen101:leaky_paywall:4.0.0
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cpe:2.3:a:zeen101:leaky_paywall:4.0.1
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cpe:2.3:a:zeen101:leaky_paywall:4.0.2
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cpe:2.3:a:zeen101:leaky_paywall:4.0.3
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cpe:2.3:a:zeen101:leaky_paywall:4.0.4
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cpe:2.3:a:zeen101:leaky_paywall:4.0.5
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cpe:2.3:a:zeen101:leaky_paywall:4.0.6
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cpe:2.3:a:zeen101:leaky_paywall:4.1.0
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cpe:2.3:a:zeen101:leaky_paywall:4.1.1
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cpe:2.3:a:zeen101:leaky_paywall:4.1.2
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cpe:2.3:a:zeen101:leaky_paywall:4.1.3
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cpe:2.3:a:zeen101:leaky_paywall:4.1.4
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cpe:2.3:a:zeen101:leaky_paywall:4.1.5
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cpe:2.3:a:zeen101:leaky_paywall:4.10.0
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cpe:2.3:a:zeen101:leaky_paywall:4.10.1
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cpe:2.3:a:zeen101:leaky_paywall:4.10.10
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cpe:2.3:a:zeen101:leaky_paywall:4.10.11
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cpe:2.3:a:zeen101:leaky_paywall:4.10.12
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cpe:2.3:a:zeen101:leaky_paywall:4.10.13
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cpe:2.3:a:zeen101:leaky_paywall:4.10.14
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cpe:2.3:a:zeen101:leaky_paywall:4.10.15
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cpe:2.3:a:zeen101:leaky_paywall:4.10.16
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cpe:2.3:a:zeen101:leaky_paywall:4.10.2
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cpe:2.3:a:zeen101:leaky_paywall:4.10.3
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cpe:2.3:a:zeen101:leaky_paywall:4.10.4
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cpe:2.3:a:zeen101:leaky_paywall:4.10.5
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cpe:2.3:a:zeen101:leaky_paywall:4.10.6
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cpe:2.3:a:zeen101:leaky_paywall:4.10.7
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cpe:2.3:a:zeen101:leaky_paywall:4.10.8
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cpe:2.3:a:zeen101:leaky_paywall:4.10.9
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cpe:2.3:a:zeen101:leaky_paywall:4.11.0
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cpe:2.3:a:zeen101:leaky_paywall:4.11.1
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cpe:2.3:a:zeen101:leaky_paywall:4.11.2
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cpe:2.3:a:zeen101:leaky_paywall:4.12.0
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cpe:2.3:a:zeen101:leaky_paywall:4.12.1
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cpe:2.3:a:zeen101:leaky_paywall:4.12.2
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cpe:2.3:a:zeen101:leaky_paywall:4.12.3
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cpe:2.3:a:zeen101:leaky_paywall:4.12.4
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cpe:2.3:a:zeen101:leaky_paywall:4.12.5
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cpe:2.3:a:zeen101:leaky_paywall:4.12.6
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cpe:2.3:a:zeen101:leaky_paywall:4.12.7
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cpe:2.3:a:zeen101:leaky_paywall:4.12.8
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cpe:2.3:a:zeen101:leaky_paywall:4.12.9
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cpe:2.3:a:zeen101:leaky_paywall:4.13.0
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cpe:2.3:a:zeen101:leaky_paywall:4.13.1
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cpe:2.3:a:zeen101:leaky_paywall:4.13.2
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cpe:2.3:a:zeen101:leaky_paywall:4.13.3
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cpe:2.3:a:zeen101:leaky_paywall:4.13.4
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cpe:2.3:a:zeen101:leaky_paywall:4.13.5
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cpe:2.3:a:zeen101:leaky_paywall:4.13.6
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cpe:2.3:a:zeen101:leaky_paywall:4.13.7
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cpe:2.3:a:zeen101:leaky_paywall:4.13.8
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cpe:2.3:a:zeen101:leaky_paywall:4.13.9
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cpe:2.3:a:zeen101:leaky_paywall:4.14.0
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cpe:2.3:a:zeen101:leaky_paywall:4.14.1
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cpe:2.3:a:zeen101:leaky_paywall:4.14.2
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cpe:2.3:a:zeen101:leaky_paywall:4.14.3
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cpe:2.3:a:zeen101:leaky_paywall:4.14.4
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cpe:2.3:a:zeen101:leaky_paywall:4.14.5
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cpe:2.3:a:zeen101:leaky_paywall:4.14.6
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cpe:2.3:a:zeen101:leaky_paywall:4.14.7
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cpe:2.3:a:zeen101:leaky_paywall:4.15.0
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cpe:2.3:a:zeen101:leaky_paywall:4.15.1
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cpe:2.3:a:zeen101:leaky_paywall:4.15.2
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cpe:2.3:a:zeen101:leaky_paywall:4.15.3
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cpe:2.3:a:zeen101:leaky_paywall:4.15.4
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cpe:2.3:a:zeen101:leaky_paywall:4.15.5
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cpe:2.3:a:zeen101:leaky_paywall:4.15.6
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cpe:2.3:a:zeen101:leaky_paywall:4.15.7
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cpe:2.3:a:zeen101:leaky_paywall:4.15.8
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cpe:2.3:a:zeen101:leaky_paywall:4.15.9
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cpe:2.3:a:zeen101:leaky_paywall:4.16.0
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cpe:2.3:a:zeen101:leaky_paywall:4.16.1
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cpe:2.3:a:zeen101:leaky_paywall:4.16.2
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cpe:2.3:a:zeen101:leaky_paywall:4.16.3
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cpe:2.3:a:zeen101:leaky_paywall:4.16.4
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cpe:2.3:a:zeen101:leaky_paywall:4.16.5
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cpe:2.3:a:zeen101:leaky_paywall:4.2.0
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cpe:2.3:a:zeen101:leaky_paywall:4.3.0
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cpe:2.3:a:zeen101:leaky_paywall:4.4.0
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cpe:2.3:a:zeen101:leaky_paywall:4.5.0
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cpe:2.3:a:zeen101:leaky_paywall:4.5.1
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cpe:2.3:a:zeen101:leaky_paywall:4.5.2
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cpe:2.3:a:zeen101:leaky_paywall:4.6.0
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cpe:2.3:a:zeen101:leaky_paywall:4.6.1
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cpe:2.3:a:zeen101:leaky_paywall:4.7.0
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cpe:2.3:a:zeen101:leaky_paywall:4.8.0
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cpe:2.3:a:zeen101:leaky_paywall:4.9.0
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cpe:2.3:a:zeen101:leaky_paywall:4.9.1
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cpe:2.3:a:zeen101:leaky_paywall:4.9.2