Krayin CRM Email Compose Function Remote Code Execution

An issue in Krayin CRM v.2.1.5 and fixed in v.2.1.6 allows a remote attacker to execute arbitrary code via the compose email function

Casky was already ahead

This CVE exploits attack patterns that Casky's 301matched 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

Krayin CRM versions up to 2.1.5 contain a critical remote code execution vulnerability in the email compose functionality that allows unauthenticated attackers to execute arbitrary code on affected systems. This vulnerability is particularly dangerous because email composition is typically a high-frequency user interaction, making it an attractive attack vector for threat actors seeking initial system compromise. Organizations using Krayin CRM for customer relationship management—spanning small businesses to mid-market enterprises—face immediate risk of complete system takeover, data exfiltration, and lateral movement into connected infrastructure.

Casky's 301 mapped skills leverage Claude's extended reasoning to detect the attack patterns underlying this vulnerability across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0043 (Reconnaissance). Practitioners using Casky would identify suspicious patterns in email compose requests, including unusual parameter injection attempts in form fields, unexpected code patterns in email body submissions, and anomalous process execution spawning from web application contexts. The platform's skills would flag CWE-94 (Code Injection) indicators—such as unvalidated input reaching code execution paths—and correlate them with post-compromise activity like process creation and command execution. Security teams would see findings highlighting the progression from reconnaissance through email function probing to successful code execution, enabling faster incident response and remediation before widespread compromise occurs.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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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 →

301 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-36340.

analyzing-apt-group-with-mitre-navigator

threat intelligence · low

Run

analyzing-campaign-attribution-evidence

threat intelligence · low

Run

analyzing-certificate-transparency-for-phishing

threat intelligence · low

Run

MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-36340

Casky has 301 skills that investigate the attack patterns behind CVE-2026-36340. Run one and get CVSS-scored findings in 3 minutes.

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