RCE in Nextcloud Extract
CVE-2019-12739
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).
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.025 · change: -0.000
Affected products
Weakness classification (CWE)
References
- hackerone.com/reports/546753 (Exploit, Third Party Advisory)
- www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/
Frequently asked questions
- What is CVE-2019-12739?
- CVE-2019-12739 is a critical-severity vulnerability in Nextcloud Extract, classified under OS Command Injection. CVSS score: 9.0/10. Published 2019-06-05.
- How severe is CVE-2019-12739?
- Critical severity. CVSS v3 base score is 9.0 out of 10.