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CVE-2026-6854— My Calendar <= 3.7.8 - Unauthenticated SQL Injection via 'mc_auth' and 'mc_host' Parameters

Quick assessment

Affected
joedolson My Calendar – Accessible Event Manager
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

joedolson My Calendar – Accessible Event Manager是joedolson的事件管理器插件。 Joe Dolson My Calendar 3.7.8及之前版本存在SQL注入漏洞，该漏洞源于对用户提供的'mc_auth'参数转义不足且SQL查询准备不足，可能导致未经身份验证的攻击者将额外的SQL查询附加到已有查询中，从数据库提取敏感信息。

CVSS 7.5 · High EPSS 1.58% · P75

Public Exploits 1

Nuclei · 1 CVE-2026-6854.yaml [template]

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 1

VendorProduct Version RangeStatus
joedolson My Calendar – Accessible Event Manager ≤ 3.7.8 affected
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I. Basic Information for CVE-2026-6854

Vulnerability Information
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Vulnerability Title
My Calendar <= 3.7.8 - Unauthenticated SQL Injection via 'mc_auth' and 'mc_host' Parameters
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Joe Dolson My Calendar SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
joedolson My Calendar – Accessible Event Manager是joedolson的事件管理器插件。 Joe Dolson My Calendar 3.7.8及之前版本存在SQL注入漏洞，该漏洞源于对用户提供的'mc_auth'参数转义不足且SQL查询准备不足，可能导致未经身份验证的攻击者将额外的SQL查询附加到已有查询中，从数据库提取敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
joedolson My Calendar – Accessible Event Manager 0 ~ 3.7.8 -

II. Public POCs for CVE-2026-6854

# POC Description Source Link Shenlong Link
1 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. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-6854.yaml POC Details
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III. Intelligence Information for CVE-2026-6854

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News Coverage for CVE-2026-6854 (1)

IV. Related Vulnerabilities

Same product: My Calendar – Accessible Event Manager
Same vendor: joedolson
Same weakness: CWE-89

V. Comments for CVE-2026-6854

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