CVE-2023-34092 | Vite Server Options (server.fs.deny) can be bypassed using double forward-slash (//)

Exp

Vite provides frontend tooling. Prior to versions 2.9.16, 3.2.7, 4.0.5, 4.1.5, 4.2.3, and 4.3.9, Vite Server Options (`server.fs.deny`) can be bypassed using double forward-slash (//) allows any unauthenticated user to read file from the Vite root-path of the application including the default `fs.deny` settings (`['.env', '.env.*', '*.{crt,pem}']`). Only users explicitly exposing the Vite dev server to the network (using `--host` or `server.host` config option) are affected, and only files in the immediate Vite project root folder could be exposed. This issue is fixed in [email protected], [email protected], [email protected], [email protected], [email protected], and [email protected].

Published: 2023-06-01 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-34092 is rated High Exploit Risk (84.3/100): CVSS High severity, with high exploitation likelihood (EPSS 51.32%, 98th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +6.53% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-34092

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-34092

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-24 44.79% 51.32% +6.53%
2 2026-04-29 48.70% 44.79% -3.91%
3 2026-04-21 — 48.70% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-34092

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-34092

GitHub Security Advisory for CVE-2023-34092

GHSA-353f-5xf4-qw67 · Severity: high · Ecosystem: npm — Vite Server Options (server.fs.deny) can be bypassed using double forward-slash (//)

Affected software / configurations for CVE-2023-34092

Vendor Product Version Raw CPE
vitejs vite >= 3.0.2, < 3.2.7 cpe:2.3:a:vitejs:vite:*:*:*:*:*:node.js:*:*
vitejs vite >= 4.0.0, < 4.0.5 cpe:2.3:a:vitejs:vite:*:*:*:*:*:node.js:*:*
vitejs vite >= 4.1.0, < 4.1.5 cpe:2.3:a:vitejs:vite:*:*:*:*:*:node.js:*:*
vitejs vite >= 4.2.0, < 4.2.3 cpe:2.3:a:vitejs:vite:*:*:*:*:*:node.js:*:*
vitejs vite >= 4.3.0, < 4.3.9 cpe:2.3:a:vitejs:vite:*:*:*:*:*:node.js:*:*
vitejs vite 2.9.15 cpe:2.3:a:vitejs:vite:2.9.15:*:*:*:*:node.js:*:*

References for CVE-2023-34092

cvelogic Threat Intelligence