Path Traversal in Rstudio Shiny Server
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.144 (96.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.144 · newest: 0.144 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/colemanjp/shinyserver-directory-traversal-source-code-leak (Exploit, Third Party Advisory)
- blog.rstudio.com/2021/01/13/shiny-server-1-5-16-update/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-3374?
- CVE-2021-3374 is a medium-severity vulnerability in Rstudio Shiny Server, classified under Path Traversal. CVSS score: 5.3/10. Published 2021-04-02.
- How severe is CVE-2021-3374?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-3374 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.