LiteSpeed Web Server Enterprise 5.4.11 External App Configuration Interface Command os command injection

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in LiteSpeed Web Server Enterprise 5.4.11. It has been classified as critical. This affects an unknown function of the component External App Configuration Interface. Performing a manipulation of the argument Command results in os command injection. This vulnerability is cataloged as CVE-2021-47903. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in LiteSpeed Web Server Enterprise 5.4.11. This affects an unknown code block of the component External App Configuration Interface. The manipulation of the argument Command with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

LiteSpeed Web Server Enterprise 5.4.11 contains an authenticated command injection vulnerability in the external app configuration interface. Authenticated administrators can inject shell commands through the 'Command' parameter in the server configuration, allowing remote code execution via path traversal and bash command injection.

The weakness was shared by Cmos as 49523. The advisory is shared at exploit-db.com. This vulnerability is uniquely identified as CVE-2021-47903 since 01/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1202 for this issue.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (49523) and EUVD (EUVD-2026-4277). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Exploit-DB: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/18/2026 CVE reserved
01/23/2026 +5 days Advisory disclosed
01/23/2026 +0 days VulDB entry created
01/24/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: 49523
Researcher: Cmos
Status: Not defined

CVE: CVE-2021-47903 (🔒)
GCVE (CVE): GCVE-0-2021-47903
GCVE (VulDB): GCVE-100-342669
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/23/2026 18:35
Updated: 01/24/2026 09:56
Changes: 01/23/2026 18:35 (82), 01/24/2026 09:56 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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