The Ninja Forms - File Uploads plugin for WordPress is vulnerable to Arbitrary File Read via the attach_files() function in versions up to, and including, 3.3.29. This is due to the get_files_for_attachment() function accepting a raw attacker-controlled 'files' array when the process() method returns early due to a client-supplied saveProgress flag, bypassing all upload validation, path normalization, and database record creation steps, and allowing an attacker-supplied file_path value to reach wp_mail() as an email attachment with only a file_exists() check. This makes it possible for unauthenticated attackers to read arbitrary files on the affected site's server.
Casky was already ahead
This CVE exploits attack patterns that Casky's 347matched 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.
The Ninja Forms - File Uploads plugin for WordPress contains a critical arbitrary file read vulnerability affecting versions up to 3.3.29. The flaw exists in the attach_files() function, which improperly validates user-supplied file paths when the saveProgress flag is set, allowing attackers to bypass file upload validation and path normalization checks. This vulnerability affects any WordPress site running the vulnerable plugin version, enabling attackers to read sensitive files from the server such as configuration files, database credentials, and other protected data. The CVSS 7.5 score reflects the high severity of unrestricted file access without requiring authentication in many configurations.
Casky's 347 mapped security skills leverage Claude AI with extended reasoning to detect the attack patterns underlying this CVE across MITRE ATT&CK techniques TA0001 (Initial Access) and TA0007 (Discovery). Practitioners using Casky would identify suspicious activity through detection of: (1) abnormal HTTP POST requests to the Ninja Forms plugin endpoints with crafted 'files' array parameters and saveProgress flags set to true; (2) file system access patterns attempting to read files outside the intended uploads directory using path traversal sequences; (3) reconnaissance activity scanning plugin functionality for version identification and parameter fuzzing. The platform's findings would correlate these indicators with known exploitation signatures, highlighting attempts to access /wp-config.php, .env files, or other sensitive configuration data—providing practitioners with the specific attack chain context needed to respond and patch systems immediately.
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 →
These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-13369.
Casky has 347 skills that investigate the attack patterns behind CVE-2026-13369. Run one and get CVSS-scored findings in 3 minutes.
Run the skill that detects this →analyzing-ios-app-security-with-objection
mobile security · low
analyzing-malicious-url-with-urlscan
phishing defense · medium
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auditing-aws-s3-bucket-permissions
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auditing-azure-active-directory-configuration
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auditing-cloud-with-cis-benchmarks
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detecting-aws-iam-privilege-escalation
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detecting-azure-lateral-movement
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detecting-compromised-cloud-credentials
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detecting-cryptomining-in-cloud
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detecting-kerberoasting-attacks
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detecting-lateral-movement-with-splunk
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threat hunting · low
detecting-mimikatz-execution-patterns
threat hunting · low
detecting-misconfigured-azure-storage
cloud security · low
detecting-mobile-malware-behavior
mobile security · low
detecting-modbus-command-injection-attacks
ot ics security · medium
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ot ics security · medium
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detecting-oauth-token-theft
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detecting-pass-the-hash-attacks
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detecting-privilege-escalation-attempts
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detecting-process-hollowing-technique
threat hunting · low
detecting-qr-code-phishing-with-email-security
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detecting-s3-data-exfiltration-attempts
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detecting-serverless-function-injection
cloud security · low
detecting-service-account-abuse
threat hunting · low
detecting-shadow-api-endpoints
api security · medium
detecting-shadow-it-cloud-usage
cloud security · low
detecting-spearphishing-with-email-gateway
phishing defense · medium
detecting-stuxnet-style-attacks
ot ics security · medium
detecting-suspicious-oauth-application-consent
cloud security · low
detecting-suspicious-powershell-execution
threat hunting · low
detecting-t1003-credential-dumping-with-edr
threat hunting · low
detecting-t1055-process-injection-with-sysmon
threat hunting · low
detecting-t1548-abuse-elevation-control-mechanism
threat hunting · low
detecting-wmi-persistence
threat hunting · low
emulating-cloud-attacks-with-stratus-red-team
cloud security · low
enumerating-cloud-with-cloudfox
cloud security · low
executing-active-directory-attack-simulation
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api security · medium
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cloud security · low
exploiting-broken-function-level-authorization
api security · medium
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api security · medium
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exploiting-insecure-deserialization
web application security · medium
exploiting-jwt-algorithm-confusion-attack
api security · medium
exploiting-kerberoasting-with-impacket
red teaming · high
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exploiting-prototype-pollution-in-javascript
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exploiting-server-side-request-forgery
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exploiting-vulnerabilities-with-metasploit-framework
vulnerability management · medium
exploiting-websocket-vulnerabilities
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fleet-hunting-with-velociraptor
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hunting-evtx-with-chainsaw
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hunting-for-data-staging-before-exfiltration
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hunting-for-dcom-lateral-movement
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hunting-for-dcsync-attacks
threat hunting · low
hunting-for-defense-evasion-via-timestomping
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hunting-for-dns-tunneling-with-zeek
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threat hunting · low
hunting-for-lolbins-execution-in-endpoint-logs
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hunting-for-ntlm-relay-attacks
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hunting-for-persistence-mechanisms-in-windows
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hunting-for-persistence-via-wmi-subscriptions
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hunting-for-registry-persistence-mechanisms
threat hunting · low
hunting-for-registry-run-key-persistence
threat hunting · low
hunting-for-scheduled-task-persistence
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hunting-for-shadow-copy-deletion
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hunting-for-spearphishing-indicators
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hunting-for-startup-folder-persistence
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hunting-for-supply-chain-compromise
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hunting-for-suspicious-scheduled-tasks
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hunting-for-t1098-account-manipulation
threat hunting · low
hunting-for-unusual-network-connections
threat hunting · low
hunting-for-unusual-service-installations
threat hunting · low
hunting-for-webshell-activity
threat hunting · low
implementing-anti-phishing-training-program
phishing defense · medium
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api security · medium
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devsecops · low
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implementing-azure-defender-for-cloud
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implementing-cloud-dlp-for-data-protection
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vulnerability management · medium
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devsecops · low
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ot ics security · medium
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devsecops · low
implementing-gcp-binary-authorization
cloud security · low
implementing-gcp-organization-policy-constraints
cloud security · low
implementing-gcp-vpc-firewall-rules
cloud security · low
implementing-github-advanced-security-for-code-scanning
devsecops · low
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phishing defense · medium
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devsecops · low
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phishing defense · medium
implementing-mobile-application-management
mobile security · low
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ot ics security · medium
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ot ics security · medium
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devsecops · low
implementing-proofpoint-email-security-gateway
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ot ics security · medium
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devsecops · low
integrating-sast-into-github-actions-pipeline
devsecops · low
intercepting-mobile-traffic-with-burpsuite
mobile security · low
managing-cloud-identity-with-okta
cloud security · low
mapping-attack-paths-with-bloodhound-ce
red teaming · high
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operating-havoc-c2
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devsecops · low
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red teaming · high
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ot ics security · medium
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red teaming · high
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mobile security · low
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ot ics security · medium
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red teaming · high
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ot ics security · medium
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api security · medium
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web application security · medium
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devsecops · low
performing-vulnerability-scanning-with-nessus
penetration testing · medium
performing-web-application-firewall-bypass
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performing-web-application-penetration-test
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performing-web-application-scanning-with-nikto
vulnerability management · medium
performing-web-application-vulnerability-triage
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web application security · medium
performing-wireless-network-penetration-test
penetration testing · medium
prioritizing-vulnerabilities-with-cvss-scoring
vulnerability management · medium
relaying-ntlm-for-adcs-esc8
red teaming · high
remediating-s3-bucket-misconfiguration
cloud security · low
reverse-engineering-ios-app-with-frida
mobile security · low
scanning-containers-with-trivy-in-cicd
devsecops · low
scanning-iac-and-images-with-trivy
devsecops · low
scanning-infrastructure-with-nessus
vulnerability management · medium
securing-api-gateway-with-aws-waf
cloud security · low
securing-aws-iam-permissions
cloud security · low
securing-aws-lambda-execution-roles
cloud security · low
securing-azure-with-microsoft-defender
cloud security · low
securing-container-registry-images
cloud security · low
securing-github-actions-workflows
devsecops · low
securing-historian-server-in-ot-environment
ot ics security · medium
securing-kubernetes-on-cloud
cloud security · low
securing-remote-access-to-ot-environment
ot ics security · medium
securing-serverless-functions
cloud security · low
testing-android-intents-for-vulnerabilities
mobile security · low
testing-api-authentication-weaknesses
api security · medium
testing-api-for-broken-object-level-authorization
api security · medium
testing-api-for-mass-assignment-vulnerability
api security · medium
testing-api-security-with-owasp-top-10
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testing-cors-misconfiguration
web application security · medium
testing-for-broken-access-control
web application security · medium
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web application security · medium
testing-for-email-header-injection
web application security · medium
testing-for-host-header-injection
web application security · medium
testing-for-json-web-token-vulnerabilities
web application security · medium
testing-for-open-redirect-vulnerabilities
web application security · medium
testing-for-sensitive-data-exposure
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testing-for-xml-injection-vulnerabilities
web application security · medium
testing-for-xss-vulnerabilities
penetration testing · medium
testing-for-xss-vulnerabilities-with-burpsuite
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testing-for-xxe-injection-vulnerabilities
web application security · medium
testing-jwt-token-security
web application security · medium
testing-mobile-api-authentication
mobile security · low
testing-oauth2-implementation-flaws
api security · medium
testing-websocket-api-security
api security · medium
triaging-vulnerabilities-with-ssvc-framework
vulnerability management · medium
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