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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
WordfenceCNA
5.5 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
CVEADP
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CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 62%
VendorProductVersion
zeen101leaky_paywall
𝑥
≤ 4.16.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.md
https://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.php
https://wordfence.com/vulnerability-advisories/#CVE-2021-39357
https://github.com/BigTiger2020/word-press/blob/main/Leaky%20Paywall.md
https://plugins.trac.wordpress.org/changeset/2615195/leaky-paywall/trunk/class.php
https://wordfence.com/vulnerability-advisories/#CVE-2021-39357