CVE-2023-4021: medium-severity vulnerability in webnus/ Modern Events Calendar Lite
Modern Events Calendar lite < 7.1.0 - Authenticated (Admin+) Stored Cross-Site Scripting
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.4epss 0.4%
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.
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Affected products
webnus/ · Modern Events Calendar LiteRelated CVEs — webnus/ Modern Events Calendar Lite
In the same product, most dangerous first.
CVE-2024-5441HIGHModern Events Calendar <= 7.11.0 - Authenticated (Subscriber+) Arbitrary File UploadEPSS 1.1%CVE-2024-6522HIGHModern Events Calendar <= 7.12.1 - Authenticated (Subscriber+) Server Side Request ForgeryEPSS 0.4%CVE-2021-4458MEDIUMModern Events Calendar Lite <= 6.3.0 - Unauthenticated SQL InjectionEPSS 0.4%CVE-2025-5733MEDIUMModern Events Calendar <= 7.21.9 - Information ExposureEPSS 0.4%