What is CVE-2023-4620?

CVE-2023-4620 is a medium-severity vulnerability in Wpbookingcalendar Booking Calendar, classified under CWE-79 CROSS-SITE SCRIPTING (XSS). CVSS score: 6.1/10. Published 2023-10-16.

How severe is CVE-2023-4620?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2023-4620 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Wpbookingcalendar Booking Calendar

CVE-2023-4620

The Booking Calendar WordPress plugin before 9.7.3.1 does not sanitize and escape some of its booking from data, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against administrators

Published 2023-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.4th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Wpbookingcalendar Booking Calendar
Booking Calendar — versions 0

Public proof-of-concept exploits

References

wpscan.com/vulnerability/084e9494-2f9e-4420-9bf7-78a1a41433d7 (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-4620?: CVE-2023-4620 is a medium-severity vulnerability in Wpbookingcalendar Booking Calendar, classified under CWE-79 CROSS-SITE SCRIPTING (XSS). CVSS score: 6.1/10. Published 2023-10-16.
How severe is CVE-2023-4620?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2023-4620 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.