CVE-2021-3374: Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash

Medium severity · published Apr 2, 2021

CVE-2021-3374

Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash

5.3

CVSS

14.8%

EPSS

On KEV

Description

Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

Low

Integrity

None

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)14.8% · higher than 97% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Shiny Server · Rstudio

before 1.5.16 · source: NVD

Affected product

Shiny Server

Rstudio

All Shiny Server CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-3374

CVE.org

https://www.cve.org/CVERecord?id=CVE-2021-3374

Vendor Advisory

https://blog.rstudio.com/2021/01/13/shiny-server-1-5-16-update/

Exploit

https://github.com/colemanjp/shinyserver-directory-traversal-source-code-leak