PatchSiren

PatchSiren cyber security CVE debrief

CVE-2016-20068 dwbooster CVE debrief

CVE-2016-20068 is a high-severity SQL injection vulnerability in WordPress Booking Calendar Contact Form version 1.0.23. The vulnerability allows remote attackers to execute arbitrary SQL queries by injecting malicious code through the 'id' parameter. Attackers can send requests to the admin-ajax.php endpoint with the action parameter set to 'dex_bccf_calendar_ajaxevent' and supply crafted SQL commands in the 'id' parameter to extract sensitive database information.

Vendor
dwbooster
Product
Booking Calendar Contact Form
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of WordPress Booking Calendar Contact Form version 1.0.23 should apply patches or mitigations to prevent exploitation.

Technical summary

The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity. It is related to CWE-89, which is a SQL injection vulnerability.

Defensive priority

high

Recommended defensive actions

  • Apply patches or updates to WordPress Booking Calendar Contact Form to prevent exploitation.
  • Restrict access to the admin-ajax.php endpoint to only trusted users.
  • Monitor for suspicious activity on the admin-ajax.php endpoint.

Evidence notes

The vendor of the affected product is likely Dwbooster, based on the provided evidence.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-20068 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-20068

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2016-20068 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-20068

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.