XSS in Dwbooster Appointment Booking Calendar
CVE-2016-20084
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (15.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- Product Reference (product)
- www.exploit-db.com/exploits/39341 (exploit)
- www.vulncheck.com/advisories/wordpress-appointment-booking-calendar-privilege-e… (third-party-advisory)
- wordpress.org/plugins/appointment-booking-calendar/ (product)
Frequently asked questions
- What is CVE-2016-20084?
- CVE-2016-20084 is a high-severity vulnerability in Dwbooster Appointment Booking Calendar, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-06-15.
- How severe is CVE-2016-20084?
- High severity. CVSS v3 base score is 7.2 out of 10.