joedolson My Calendar Plugin up to 3.8.10 on WordPress Shortcode my-calendar-search.php mc_search_results mcs code injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in joedolson My Calendar Plugin up to 3.8.10. The affected element is the function mc_search_results of the file src/my-calendar-search.php of the component Shortcode Handler. Performing a manipulation of the argument mcs results in code injection. This vulnerability is identified as CVE-2026-119714. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in joedolson My Calendar Plugin up to 3.8.10. It has been classified as critical. This affects the function mc_search_results of the file src/my-calendar-search.php of the component Shortcode Handler. The manipulation of the argument mcs with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

My Calendar WordPress plugin 3.8.8 before 3.8.11 contains a shortcode injection vulnerability that allows unauthenticated attackers to execute registered shortcodes via the mcs search parameter. The mcs value reaches mc_search_results() in src/my-calendar-search.php without bracket encoding before do_shortcode runs, so a GET request triggers shortcodes on any page or post, enabling content injection and spoofing.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-119714 since 10/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

By approaching the search of inurl:src/my-calendar-search.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 3.8.11 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• joedolson

Name

• My Calendar Plugin

Version

• 3.8.0
• 3.8.1
• 3.8.2
• 3.8.3
• 3.8.4
• 3.8.5
• 3.8.6
• 3.8.7
• 3.8.8
• 3.8.9
• 3.8.10

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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