CVE-2026-54420

LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn before 5.3.2.0) mishandles symlinks provided by a user with FTP or web shell access on a shared hosting server running CloudLinux/CageFS, as exploited in the wild in May 2026.

CVSS v3 8.5 HIGH

8.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/	Vendor Advisory
https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel	Product
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420	US Government Resource

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:litespeedtech:litespeed_cpanel_plugin::::::::
	cpe:2.3:a:litespeedtech:litespeed_whm_plugin::::::::

History

No history.

Information

Published : 2026-06-14 04:16

Updated : 2026-07-23 09:10

NVD link : CVE-2026-54420

Mitre link : CVE-2026-54420

CVE.ORG link : CVE-2026-54420

JSON object : View

Products Affected

litespeedtech

litespeed_cpanel_plugin
litespeed_whm_plugin

CWE

CWE-61

UNIX Symbolic Link (Symlink) Following

{"id": "CVE-2026-54420", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54420", "role": "CISA Coordinator", "options": [{"exploitation": "active"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-15T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 1.8}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "LiteSpeed Technologies", "product": "cPanel Plugin", "versions": [{"status": "affected", "version": "2.3", "lessThan": "2.4.8", "versionType": "custom"}], "platforms": ["Linux"], "packageName": "WHM and cPanel PlugIn", "defaultStatus": "unaffected"}]}], "published": "2026-06-14T04:16:28.630", "references": [{"url": "https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel", "tags": ["Product"], "source": "cve@mitre.org"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-61"}]}], "descriptions": [{"lang": "en", "value": "LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn before 5.3.2.0) mishandles symlinks provided by a user with FTP or web shell access on a shared hosting server running CloudLinux/CageFS, as exploited in the wild in May 2026."}, {"lang": "es", "value": "El plugin LiteSpeed cPanel anterior a 2.4.8 (tal como se distribuy\u00f3 en LiteSpeed WHM PlugIn anterior a 5.3.2.0) maneja incorrectamente los enlaces simb\u00f3licos proporcionados por un usuario con acceso FTP o a shell web en un servidor de alojamiento compartido que ejecuta CloudLinux/CageFS, tal como fue explotado en ataques reales en mayo de 2026."}], "lastModified": "2026-07-23T09:10:00.113", "cisaActionDue": "2026-06-18", "cisaExploitAdd": "2026-06-15", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:litespeedtech:litespeed_cpanel_plugin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B1876E6-E6BF-4D4F-8BF7-5555F32A9787", "versionEndExcluding": "2.4.8"}, {"criteria": "cpe:2.3:a:litespeedtech:litespeed_whm_plugin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "63B844E5-0AFC-4E5B-81AA-AC01FA8FA29C", "versionEndExcluding": "5.3.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org", "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.", "cisaVulnerabilityName": "LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability"}