CVE-2016-20069

WordPress Booking Calendar Contact Form 1.0.23 SQL Injection

High8.8Public exploitEPSS 0.24%

Published: 15 Jun 2026
Updated: 15 Jul 2026
Reserved: 14 Jun 2026
Assigned by: VulnCheck

Description

WordPress Booking Calendar Contact Form 1.0.23 contains an unauthenticated blind SQL injection vulnerability in the shortcode function that fails to sanitize the calendar parameter before using it in database queries. Attackers can inject SQL commands through the calendar shortcode parameter to execute arbitrary SQL queries and extract sensitive database information.

Public exploit

A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.

ExploitDB-39423 (opens in a new tab)exploit

Timeline

2026
14 Jun 2026
14 Jun 2026
ID reserved
By VulnCheck
15 Jun 20261 day later
15 Jun 2026· 1 day later
Published
15 Jul 202630 days later
15 Jul 2026· 30 days later
Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2016-20069, by who scored it
Scored by	CVSS	Score	Vector
VulnCheckCNA (assigner)	4.0	High8.8	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
VulnCheckCNA (assigner)	3.1	High8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
NVDNVD · Deferred	4.0	High8.8	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.24% · top 85% of all CVEs (8 Nov 2026)
CISA SSVC: Exploitation: poc · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (opens in a new tab)All about CWE-89 and its CVEs

Affected products

dwbooster · Booking Calendar Contact Form
- affected ≤ 1.0.23

References (3)

ExploitDB-39423 (opens in a new tab)exploit
Official Product Homepage (opens in a new tab)product
VulnCheck Advisory: WordPress Booking Calendar Contact Form 1.0.23 SQL Injection (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2016-20069](https://cveledger.app/badge/CVE-2016-20069.svg)](https://cveledger.app/cve/CVE-2016-20069)

Record last updated 15 Jul 2026, 01:23 UTC.