WordPress Calendar Plugin Vulnerable to Unauthenticated SQL Injection

The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'mc_auth' parameter in all versions up to, and including, 3.7.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Casky was already ahead

This CVE exploits attack patterns that Casky's 322matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

The My Calendar – Accessible Event Manager WordPress plugin contains a critical time-based blind SQL injection vulnerability in the 'mc_auth' parameter affecting all versions up to 3.7.8. This flaw stems from insufficient input escaping and improper SQL query preparation, allowing unauthenticated attackers to inject malicious SQL commands. With a CVSS score of 7.5, this vulnerability directly impacts WordPress site administrators and users relying on this popular accessibility plugin. Attackers can exploit this to extract sensitive database information, including user credentials, configuration data, and other confidential records without requiring authentication—a significant risk for websites that haven't patched to version 3.7.9 or later.

Casky's 322 mapped skills detect this attack pattern by correlating CWE-89 (SQL Injection) with MITRE ATT&CK techniques TA0001 (Reconnaissance) and TA0043 (Reconnaissance) through Claude AI's extended reasoning capabilities. Practitioners would identify suspicious findings including: anomalous SQL query timing patterns in web server logs, unusual database query latency spikes tied to specific parameter values, time-delay payloads in HTTP requests to the vulnerable endpoint, and sequential database extraction attempts characteristic of blind SQL injection. The platform's skill set enables detection of the reconnaissance phase where attackers probe parameter handling, followed by data exfiltration attempts using time-based inference techniques—allowing security teams to catch exploitation attempts before sensitive data is compromised.

Live Threat IntelligenceComing soon

Casky Risk Score

—

EPSS Probability

—

Shodan Exposure

—

GreyNoise Signal

—

Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

322 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-6854.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

Run

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-6854

Casky has 322 skills that investigate the attack patterns behind CVE-2026-6854. Run one and get CVSS-scored findings in 3 minutes.

Run the skill that detects this →

X Instagram LinkedIn