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CVE-2021-43795

24
FAUCET Score

CVE-2021-43795 is a path traversal vulnerability affecting Armeria, an open-source microservice framework, where an attacker can access arbitrary files on the server's local file system by encoding forward slashes in HTTP request paths. With a CVSS score of 7.5 (High), this vulnerability allows an unauthenticated attacker to achieve high confidentiality impact with low attack complexity. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE. Armeria versions 1.13.4 and above address this flaw with hardened path validation logic.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.13.4CPE matchmatch criteria
cpe:2.3:a:linecorp:armeria:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.64%
Probability of exploitation in next 30 days
EPSS Percentile
73.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0164 is in the 56th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.linecorp.armeria:armeriaFixed in: 1.13.4

Vendor Advisories (1)

mavenGHSA-8fp4-rp6c-5gcvhigh

Path Traversal in com.linecorp.armeria:armeria

Dec 2, 2021

References

github.com / line/armeria/commit/e2697a575e9df6692b423e02d731f293c1313284
PatchThird Party Advisory
github.com / line/armeria/pull/3855
Third Party Advisory
github.com / line/armeria/security/advisories/GHSA-8fp4-rp6c-5gcv
Third Party Advisory