CVE-2019-12739
9.0 · CRITICALOverview
CVE-2019-12739 is a critical-severity vulnerability affecting nextcloud extract. It was published on June 5, 2019 and has a CVSS 3.0 base score of 9.0 (CRITICAL).
This vulnerability has a CVSS 3.0 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
lib/Controller/ExtractionController.php in the Extract add-on before 1.2.0 for Nextcloud allows Remote Code Execution via shell metacharacters in a RAR filename via ajax/extractRar.php (nameOfFile and directory parameters).
Remediation
Check the references section for vendor advisories and patches from nextcloud. Update extract to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nextcloud | extract | >= 0, < 1.2.0 | Affected |
Frequently Asked Questions
What is CVE-2019-12739?
CVE-2019-12739 is a critical-severity vulnerability affecting nextcloud extract. It was published on June 5, 2019 and has a CVSS 3.0 base score of 9.0 (CRITICAL).
How severe is CVE-2019-12739?
This vulnerability has a CVSS 3.0 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2019-12739?
Check the references section for vendor advisories and patches from nextcloud. Update extract to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-12739?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-12739 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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