Vulnerability Details : CVE-2019-12739
Potential exploit
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 category: Execute code
Products affected by CVE-2019-12739
- cpe:2.3:a:nextcloud:extract:*:*:*:*:*:nextcloud:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-12739
1.48%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-12739
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P |
8.0
|
6.4
|
NIST | |
|
9.0
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
2.3
|
6.0
|
MITRE | |
|
8.8
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2019-12739
-
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-12739
-
https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/
A Tale of RCE: Nextcloud + Extract App - Security Signal
-
https://hackerone.com/reports/546753
HackerOneExploit;Third Party Advisory
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