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TI-2016-09246 Aliases CVE-2016-20070GHSA-fc95-cx3j-mr5q

WordPress Booking Calendar Contact Form 1.0.23 Privilege Escalation Stored XSS

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

WordPress Booking Calendar Contact Form 1.0.23 contains privilege escalation and stored cross-site scripting vulnerabilities that allow authenticated users to modify plugin options and inject malicious scripts by failing to verify user privileges and sanitize input parameters. Attackers with subscriber-level accounts can inject XSS payloads through parameters like price, name, calendar_language, and email_confirmation_to_user via admin-ajax.php and admin.php endpoints to execute arbitrary JavaScript in administrator browsers.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00224 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
dwboosterBooking Calendar Contact Formup to 1.0.23—No fix listedCNA
  • Booking Calendar Contact Form Vendordwbooster Affected up to 1.0.23 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-20070
  2. 2026-10-03 Alias added: GHSA-fc95-cx3j-mr5q

References

Exploit 1

Other 1

  • TI-2016-09245 WordPress Booking Calendar Contact Form 1.0.23 SQL Injection CVSS 4.0HIGH 8.8
  • TI-2016-09244 WordPress Booking Calendar Contact Form 1.0.23 SQL Injection CVSS 4.0HIGH 8.8
  • TI-2016-09260 WordPress appointment-booking-calendar 1.1.24 Privilege Escalation XSS CVSS 4.0MEDIUM 5.1
  • TI-2016-09242 WordPress CP Polls 1.0.8 Persistent Cross-Site Scripting CVSS 4.0MEDIUM 5.1
  • TI-2022-01560 CP Image Store with Slideshow < 1.0.68 - Unauthenticated SQLi CVSS 3.1CRITICAL 9.8
  • TI-2022-02639 Calendar Event Multi View < 1.4.07 - Unauthenticated Arbitrary Event Creation to Stored XSS CVSS 3.1MEDIUM 4.3
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences