Modern Events Calendar Lite
CVE-2023-4021
MEDIUM
Severity by source
AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
2DescriptionCVE.org
The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
AnalysisAI
The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient. Rated medium severity (CVSS 4.4), this vulnerability is remotely exploitable. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
Technical ContextAI
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. The Modern Events Calendar lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Google API key and Calendar ID in versions up to, but not including, 7.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled. Affected products include: Webnus Modern Events Calendar Lite.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
More in Modern Events Calendar Lite
View allArbitrary file upload in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not properly chec
The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the time parameter before usi
Unvalidated input in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.6, did not sanitise the mec[
The Modern Events Calendar plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validat
Lack of authorisation checks in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not proper
The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the current_month_divider par
The Modern Events Calendar plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and
The Modern Events Calendar Lite WordPress plugin before 6.4.0 does not sanitize and escape some of the Hourly Schedule p
The Modern Events Calendar Lite WordPress plugin before 5.22.3 does not properly sanitize or escape values set by users
Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.
Multiple Stored Cross-site scripting (XSS) vulnerabilities in the Webnus Modern Events Calendar Lite plugin through 5.1.
The Modern Events Calendar Lite WordPress plugin before 6.5.2 does not sanitise and escape some of its settings, which c
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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