OpenKM Admin Script Evaluation Remote Code Execution

OpenKM 6.3.12 contains a remote code execution vulnerability that allows authenticated administrators to execute arbitrary Java/BeanShell code through the /admin/Scripting endpoint. Attackers can submit malicious script content with an action=Evaluate parameter to execute operating system commands in the context of the OpenKM application server.

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

CVE-2026-42785 is a remote code execution vulnerability in OpenKM 6.3.12 that allows authenticated administrators to execute arbitrary Java/BeanShell code through an exposed scripting endpoint. The vulnerability exists because the /admin/Scripting endpoint fails to properly validate or sandbox script content submitted with the action=Evaluate parameter, enabling attackers to break out of intended restrictions and execute operating system commands with the privileges of the OpenKM application server. This affects organizations deploying OpenKM for document management and collaboration, particularly those with compromised or malicious admin accounts, or environments where administrative access is overly permissive. The high CVSS score of 7.2 reflects the severity of unauthenticated code execution paired with the requirement for admin-level credentials.

Casky's 301 matching skills, powered by Claude AI's extended reasoning capabilities, detect the attack patterns underlying this vulnerability by mapping to MITRE ATT&CK techniques TA0001 (Reconnaissance) and TA0043 (Resource Development). Practitioners using Casky would identify suspicious findings including: (1) unusual POST requests to /admin/Scripting endpoints with action=Evaluate parameters containing script payloads, (2) execution of system commands originating from Java/BeanShell interpreters within the OpenKM process context, (3) abnormal privilege escalation or lateral movement originating from application server accounts, and (4) detection of script injection patterns in web application logs and application server telemetry. The platform's skill-based analysis would correlate these indicators across logs, network traffic, and endpoint data to surface the complete attack chain, enabling practitioners to distinguish legitimate administrative scripting from exploitation attempts and respond before code execution 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-2026-42785.

analyzing-apt-group-with-mitre-navigator

threat intelligence · low

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analyzing-campaign-attribution-evidence

threat intelligence · low

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analyzing-certificate-transparency-for-phishing

threat intelligence · low

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MITRE ATT&CK Techniques

TA0001 TA0043

Investigate the attack patterns behind CVE-2026-42785

Casky has 301 skills that investigate the attack patterns behind CVE-2026-42785. Run one and get CVSS-scored findings in 3 minutes.

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