CVE-2021-23394

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 19.1%, top 3% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 19%CVSS: 8.1Exploit: NoneExposed: 0

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

The package studio-42/elfinder before 2.1.58 are vulnerable to Remote Code Execution (RCE) via execution of PHP code in a .phar file. NOTE: This only applies if the server parses .phar files as PHP.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
57(Track)
EG Risk 57/100SSVC: 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
Severity81% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
97.0%
KEV
Not listed

Published

June 13, 2021

Last Modified

November 21, 2024

References (10)

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
studio-42/elfinder2.0.3 ... 2.1.9 (65 versions)2.1.58—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 41× 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.

  1. 2026-07-23 01:57 UTCEG score recompute
  2. 2026-07-22 22:44 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
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  6. 2026-07-20 17:04 UTCEPSS rescore
  7. 2026-07-19 14:28 UTCEPSS rescore
  8. 2026-07-19 02:26 UTCEPSS rescore
  9. 2026-07-18 18:29 UTCOSV refresh
  10. 2026-07-18 10:02 UTCEPSS rescore
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  1. 2026-07-02 16:57 UTCEPSS rescore
  2. 2026-07-01 15:03 UTCEPSS rescore
  3. 2026-07-01 01:18 UTCOSV refresh
  4. 2026-06-29 14:04 UTCEPSS rescore
  5. 2026-06-29 14:04 UTCEPSS rescore
  6. 2026-06-28 14:05 UTCEPSS rescore
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  21. 2026-06-18 17:51 UTCEPSS rescore
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  25. 2026-06-15 17:46 UTCEPSS rescore
  26. 2026-06-13 22:58 UTCEPSS rescore
  27. 2026-06-13 03:38 UTCOSV refresh
  28. 2026-06-12 23:10 UTCEPSS rescore
  29. 2026-06-12 23:10 UTCEPSS rescore
  30. 2026-06-11 13:58 UTCEPSS rescore
  31. 2026-06-10 22:16 UTCEPSS rescore
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  36. 2026-06-07 15:23 UTCEPSS rescore
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  38. 2026-06-06 13:46 UTCEPSS rescore
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  43. 2026-06-05 06:09 UTCEPSS rescore
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  46. 2026-06-04 13:10 UTCEPSS rescore
  47. 2026-06-01 13:50 UTCEPSS rescore
  48. 2026-06-01 13:50 UTCEPSS rescore
  49. 2026-05-31 00:15 UTCEPSS rescore
  50. 2026-05-31 00:15 UTCEPSS rescore
  51. 2026-05-29 13:42 UTCEPSS rescore
  52. 2026-05-28 13:43 UTCEPSS rescore
  53. 2026-05-28 13:43 UTCEPSS rescore
  54. 2026-05-26 14:56 UTCEG score recompute
  55. 2026-05-26 07:17 UTCEPSS rescore
  56. 2026-05-26 07:17 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2021/CVE-2021-23394.yaml
    First seen Jan 1, 2021

    elFinder < 2.1.58 - Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-23394?
CVE-2021-23394 is a high vulnerability published on June 13, 2021. The package studio-42/elfinder before 2.1.58 are vulnerable to Remote Code Execution (RCE) via execution of PHP code in a .phar file. NOTE: This only applies if the server parses .phar files as PHP.
When was CVE-2021-23394 disclosed?
CVE-2021-23394 was first published in the National Vulnerability Database on June 13, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-23394 actively exploited?
CVE-2021-23394 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-23394?
CVE-2021-23394 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2021-23394?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-23394, 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.

Dependency Blast Radius

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