CVE-2021-3374
Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the...
Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.
- Record
CVE-2021-3374- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
CVE List No score
Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.
- Record
CVE-2021-3374- Updated
- 2026-11-02
EUVDEUVD-2021-26705 No score
Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.
- Record
EUVD-2021-26705- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5c9r-9v3g-ggvp
Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the...
Directory traversal in RStudio Shiny Server before 1.5.16 allows attackers to read the application source code, involving an encoded slash.
- Record
GHSA-5c9r-9v3g-ggvp- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | Rstudio Shiny Server <1.5.16 - Local File Inclusion |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3374 is a medium vulnerability (CVSS 5.3) in Rstudio Shiny Server, published April 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 14.8%, the 96th percentile. No source names a fixed version.