CakePHP DebugKit up to 4.10.2/5.2.3 MailPreview MailPreviewController.php findPreview previewName code injection

Summaryinfo

A vulnerability has been found in CakePHP DebugKit up to 4.10.2/5.2.3 and classified as critical. This affects the function findPreview of the file src/Controller/MailPreviewController.php of the component MailPreview. This manipulation of the argument previewName causes code injection. This vulnerability is handled as CVE-2026-54614. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in CakePHP DebugKit up to 4.10.2/5.2.3. It has been declared as critical. Affected by this vulnerability is the function findPreview of the file src/Controller/MailPreviewController.php of the component MailPreview. The manipulation of the argument previewName with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

DebugKit provides a debugging toolbar for CakePHP applications. Prior to 4.10.3 and 5.2.4, the DebugKit MailPreview feature in src/Controller/MailPreviewController.php accepts a route-controlled previewName value in findPreview and passes the resolved class from App::className() to constructor execution without rejecting namespace separators or verifying that the class extends DebugKit\Mailer\MailPreview. An attacker able to access DebugKit while debug mode is enabled and the request hostname is local or allowlisted can select an unintended application class through the mail-preview preview route, resulting in arbitrary constructor execution and limited disclosure of application information. This issue is fixed in versions 4.10.3 and 5.2.4.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-54614 since 06/15/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

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

Upgrading to version 4.10.3 or 5.2.4 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• CakePHP

Name

• DebugKit

Version

• 4.10.0
• 4.10.1
• 4.10.2
• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion