Vulnerability-Lookup

CVE-2026-54420 (GCVE-0-2026-54420)

Vulnerability from cvelistv5 – Published: 2026-06-14 03:23 – Updated: 2026-06-16 03:56 X_Known Exploited Vulnerability

CISA Previdian

Summary

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.

Severity

8.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-15 00:00 UTC

CWE

CWE-61 - UNIX Symbolic Link (Symlink) Following

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2158 records in the last 180 days details

References

3 references

URL	Tags
https://www.litespeedtech.com/products/litespeed-…
https://blog.litespeedtech.com/2026/06/01/securit…
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version	CPE status
LiteSpeed Technologies	cPanel Plugin	Affected: 2.3 , < 2.4.8 (custom)	guessed

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 13b0ff57-5401-41c2-9957-07ee8b739cd8

Vulnerability ID: CVE-2026-54420

Status: Confirmed

Status Updated: 2026-06-15 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2026-06-15

Asserted: 2026-06-15

Scope

Notes: LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability | Affected: LiteSpeed / cPanel Plugin | Description: LiteSpeed cPanel plugin contains a UNIX symbolic link (Symlink) following vulnerability that could allow a user with FTP or web shell access on a shared hosting server running CloudLinux/CageFS. | Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (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. | Due date: 2026-06-18 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-54420

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes	CWE-61
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	cPanel Plugin
Due Date	2026-06-18
Date Added	2026-06-15
Vendorproject	LiteSpeed
Vulnerabilityname	LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability
Knownransomwarecampaignuse	Unknown

References

CVE-2026-54420

Created: 2026-06-15 20:00 UTC | Updated: 2026-11-04 13:02 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 5ee10a93-2d01-4ce9-b596-39d0355e4cce

Vulnerability ID: CVE-2026-54420

Status: Confirmed

Status Updated: 2026-06-14 04:01 UTC

Exploited: Yes

Timestamps

First Seen: 2026-06-14

Asserted: 2026-06-14

Scope

Notes: KEVIntel entry: 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... | Affected: LiteSpeed Technologies / cPanel Plugin | CVSS: 8.5 (HIGH) | EPSS: 0.00654 | Used in malware: unknown | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	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...
Vendor	LiteSpeed Technologies
Product	cPanel Plugin
Added Date	2026-06-14T04:01:15.820Z
Cvss Score	8.5
Epss Score	0.00654
Cvss Severity	HIGH
Epss Percentile	0.46447
Used In Malware	unknown
Ahead Of Cisa Kev	`{ "count": 20, "unit": "hour" }`
Not Yet In Cisa Kev	False

References

Created: 2026-06-19 12:42 UTC | Updated: 2026-06-19 12:42 UTC

Show details on NVD website

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FKIE_CVE-2026-54420

Vulnerability from fkie_nvd - Published: 2026-06-14 04:16 - Updated: 2026-07-23 09:10

CISA Previdian

Severity

8.5 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

URL	Tags
cve@mitre.org	https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/	Vendor Advisory
cve@mitre.org	https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel	Product
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420	US Government Resource

Impacted products

	Vendor	Product	Version
	litespeedtech	litespeed_cpanel_plugin	*
	litespeedtech	litespeed_whm_plugin	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "WHM and cPanel PlugIn",
          "platforms": [
            "Linux"
          ],
          "product": "cPanel Plugin",
          "vendor": "LiteSpeed Technologies",
          "versions": [
            {
              "lessThan": "2.4.8",
              "status": "affected",
              "version": "2.3",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cisaActionDue": "2026-06-18",
  "cisaExploitAdd": "2026-06-15",
  "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\u0027s internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:litespeedtech:litespeed_cpanel_plugin:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6B1876E6-E6BF-4D4F-8BF7-5555F32A9787",
              "versionEndExcluding": "2.4.8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:litespeedtech:litespeed_whm_plugin:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "63B844E5-0AFC-4E5B-81AA-AC01FA8FA29C",
              "versionEndExcluding": "5.3.2.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-54420",
  "lastModified": "2026-07-23T09:10:00.113",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 6.0,
        "source": "cve@mitre.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54420",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-15T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-14T04:16:28.630",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product"
      ],
      "url": "https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-61"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    }
  ]
}

GHSA-3G44-C4QC-CXM8

Vulnerability from github – Published: 2026-06-14 06:30 – Updated: 2026-06-15 21:30

Details

Severity

8.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-54420"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-61"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-14T04:16:28Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-3g44-c4qc-cxm8",
  "modified": "2026-06-15T21:30:32Z",
  "published": "2026-06-14T06:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54420"
    },
    {
      "type": "WEB",
      "url": "https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420"
    },
    {
      "type": "WEB",
      "url": "https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanel"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-54420 (GCVE-0-2026-54420)

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: kevintel

Details

References

FKIE_CVE-2026-54420

GHSA-3G44-C4QC-CXM8

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour