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CVE-2021-38197

31
FAUCET Score

CVE-2021-38197 is a critical directory traversal vulnerability affecting go-unarr (Go bindings for unarr) version 0.1.1, allowing an attacker to write files to arbitrary locations on a system by crafting a malicious TAR archive containing pathnames with "../". With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. While no public exploit intelligence (Metasploit, Nuclei, ExploitDB) or active exploitation has been observed, and community discussion is minimal, the high FAUCET Risk Score of 80/100 indicates its significant potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
0.1.1CPE matchmatch criteria
cpe:2.3:a:go-unarr_project:go-unarr:0.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.11%
Probability of exploitation in next 30 days
EPSS Percentile
79.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0211 is in the 69th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/gen2brain/go-unarrFixed in: 0.1.4

Vendor Advisories (1)

goGHSA-v9j4-cp63-qv62critical

Tarslip in go-unarr

Sep 1, 2021

References

github.com / gen2brain/go-unarr/issues/21
ExploitIssue TrackingThird Party Advisory