CVE-2023-34037

VMware Horizon Server contains a HTTP request smuggling vulnerability. A malicious actor with network access may be able to perform HTTP smuggle requests.

Published: 2023-08-04 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-34037 is rated Moderate Risk (48.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.97%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2023-34037

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 2026-04-29 0.78% 0.97% +0.19%
2 2026-03-04 0.22% 0.78% +0.56%
3 2026-03-01 — 0.22% —

Full EPSS history (32 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-34037

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2023-34037

Affected software / configurations for CVE-2023-34037

Vendor Product Version Raw CPE
vmware horizon_client 2006 cpe:2.3:a:vmware:horizon_client:2006:*:*:*:*:*:*:*
vmware horizon_client 2012 cpe:2.3:a:vmware:horizon_client:2012:*:*:*:*:*:*:*
vmware horizon_client 2103 cpe:2.3:a:vmware:horizon_client:2103:*:*:*:*:*:*:*
vmware horizon_client 2106 cpe:2.3:a:vmware:horizon_client:2106:*:*:*:*:*:*:*
vmware horizon_client 2111 cpe:2.3:a:vmware:horizon_client:2111:*:*:*:*:*:*:*
vmware horizon_client 2111.1 cpe:2.3:a:vmware:horizon_client:2111.1:*:*:*:*:*:*:*
vmware horizon_client 2203 cpe:2.3:a:vmware:horizon_client:2203:*:*:*:*:*:*:*
vmware horizon_client 2212 cpe:2.3:a:vmware:horizon_client:2212:*:*:*:*:*:*:*

References for CVE-2023-34037

cvelogic Threat Intelligence