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Description

WordPress appointment-booking-calendar 1.1.24 contains multiple privilege escalation vulnerabilities that allow unauthenticated attackers to modify calendar settings and inject persistent cross-site scripting payloads through the admin.php page parameters. Attackers can inject malicious JavaScript into the 'ict' and 'ics' options or the calendar 'name' parameter via GET requests to execute arbitrary scripts when the calendar is displayed or accessed in the administration interface.

PUBLISHED Reserved 2026-06-15 | Published 2026-06-15 | Updated 2026-06-15 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Any version
affected

Credits

Joaquin Ramirez Martinez [ i0 security-lab] finder

References

www.exploit-db.com/exploits/39341 (ExploitDB-39341) exploit

wordpress.dwbooster.com/...ars/booking-calendar-contact-form (Product Reference) product

www.vulncheck.com/...oking-calendar-privilege-escalation-xss (VulnCheck Advisory: WordPress appointment-booking-calendar 1.1.24 Privilege Escalation XSS) third-party-advisory

cve.org (CVE-2016-20084)

nvd.nist.gov (CVE-2016-20084)

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