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Vulnerability record · CVE-2021-25040 · published 3 January 2022

CVE-2021-25040: Booking calendar project booking calendar cross-site scripting vulnerability

Booking Calendar Project · Booking Calendar

The Booking Calendar WordPress plugin before 8.9.2 does not sanitise and escape the booking_type parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting

6.1 CVSS 3.1 Medium EPSS 0.80% · top 45.2% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The Booking Calendar WordPress plugin before 8.9.2 does not sanitise and escape the booking_type parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://wpscan.com/vulnerability/3ed821a6-c3e2-4964-86f8-d14c4a54708a ExploitThird Party Advisory
https://wpscan.com/vulnerability/3ed821a6-c3e2-4964-86f8-d14c4a54708a ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2022-1463Booking calendar project booking calendar deserialization of untrusted data vulnerabilityThe Booking Calendar plugin for WordPress is vulnerable to PHP Object Injection via the [bookingflextimeline] shortcode in versions up to, and includ…EPSS 1.7%8.8CVE-2018-20556Booking calendar project booking calendar sql injection vulnerabilitySQL injection vulnerability in Booking Calendar plugin 8.4.3 for WordPress allows remote attackers to execute arbitrary SQL commands via the booking_…EPSS 19%8.8CVE-2018-5673Booking calendar project booking calendar cross-site request forgery vulnerabilityAn issue was discovered in the booking-calendar plugin 2.1.7 for WordPress. CSRF exists via wp-admin/admin.php.EPSS 0.77%6.1CVE-2023-36384Booking calendar project booking calendar cross-site scripting vulnerabilityUnauth. Reflected Cross-Site Scripting (XSS) vulnerability in CodePeople Booking Calendar Contact Form plugin <= 1.2.40 versions.EPSS 0.41%6.1CVE-2017-2151Booking calendar project booking calendar cross-site scripting vulnerabilityCross-site scripting vulnerability in Booking Calendar version 7.1 and earlier allows remote attackers to inject arbitrary web script or HTML via uns…EPSS 0.85%5.3CVE-2017-2150Booking calendar project booking calendar path traversal vulnerabilityDirectory traversal vulnerability in Booking Calendar version 7.0 and earlier allows remote attackers to read arbitrary files via specially crafted c…EPSS 2.4%4.8CVE-2018-5671Booking calendar project booking calendar cross-site scripting vulnerabilityAn issue was discovered in the booking-calendar plugin 2.1.7 for WordPress. XSS exists via the wp-admin/admin.php extra_field1[items][field_item1][pr…EPSS 0.62%4.8CVE-2018-5672Booking calendar project booking calendar cross-site scripting vulnerabilityAn issue was discovered in the booking-calendar plugin 2.1.7 for WordPress. XSS exists via the wp-admin/admin.php form_field5[label] parameter.EPSS 0.62%

Source: NIST National Vulnerability Database (record CVE-2021-25040), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.