Vulnerability Details : CVE-2023-4021
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.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2023-4021
- cpe:2.3:a:webnus:modern_events_calendar_lite:*:*:*:*:*:wordpress:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-4021
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 20 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-4021
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
1.7
|
2.7
|
NIST | |
|
4.4
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N |
1.3
|
2.7
|
Wordfence |
CWE ids for CVE-2023-4021
-
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.Assigned by:
- nvd@nist.gov (Primary)
- security@wordfence.com (Secondary)
References for CVE-2023-4021
-
https://www.wordfence.com/threat-intel/vulnerabilities/id/f213fb42-5bab-4017-80ea-ce6543031af2?source=cve
Modern Events Calendar lite < 7.1.0 - Authenticated (Admin+) Stored Cross-Site ScriptingThird Party Advisory
-
https://webnus.net/modern-events-calendar/change-log/
Change Log – Modern Events CalendarPatch
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