CVE-2021-47903

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-01-23. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
70.6%
KEV
Not listed

Published

January 23, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated May 22, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

LiteSpeed Web Server Enterprise 5.4.11 - Command Injection (Authenticated) - PHP webapps Exploit

https://www.exploit-db.com/exploits/49523
generic

LiteSpeed Web Server Enterprise 5.4.11 - Command Injection | Advisories | VulnCheck

https://www.vulncheck.com/advisories/litespeed-web-server-enterprise-command-injection
generic

Products - LiteSpeed Technologies

https://www.litespeedtech.com/products
generic

LiteSpeed | Internet. Accelerated. - LiteSpeed Technologies

https://www.litespeedtech.com/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-07-24 14:15 UTCEPSS rescore
  2. 2026-07-24 14:15 UTCEPSS rescore
  3. 2026-07-23 14:16 UTCEPSS rescore
  4. 2026-07-23 02:06 UTCEG score recompute
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  50. 2026-06-08 03:28 UTCGHSA enrichment
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Frequently asked(5)

What is CVE-2021-47903?
CVE-2021-47903 is a high vulnerability published on January 23, 2026. 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…
When was CVE-2021-47903 disclosed?
CVE-2021-47903 was first published in the National Vulnerability Database on January 23, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47903 actively exploited?
CVE-2021-47903 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-47903?
CVE-2021-47903 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2021-47903?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47903, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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