LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability
LiteSpeed Technologies — cPanel Plugin
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.
8.5
1.4%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Published
- Jun 14, 2026
- Modified
- Jul 23, 2026
- Added to KEV
- Jun 15, 2026
- Federal patch due
- Jun 18, 2026
CISA 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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
4 foundWeaponization
Public repositories whose name or description references CVE-2026-54420, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- mahfuzreham/litespeed-cpanel-cve-2026-54420-fix★ 2
updated Aug 30, 2026
- HORKimhab/CVE-2026-54420★ 1
CVE-2026-54420
updated Jul 13, 2026
- Resellnom/litespeed-cpanel-cve-2026-54420-fix★ 0
updated Jun 16, 2026
- fevar54/CVE-2026-54420-LiteSpeed-Symlink-Exploit★ 0
PoC de CVE-2026-54420: explotacion via symlink en el plugin LiteSpeed de cPanel/WHM.
updated Aug 25, 2026
References
Frequently asked questions
What is 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.
How severe is CVE-2026-54420?
CVE-2026-54420 has a CVSS base score of 8.5 out of 10 (CVSS 3.1).
Is CVE-2026-54420 actively exploited in the wild?
Yes. CVE-2026-54420 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jun 15, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-54420?
1.4% - meaning FIRST.org's EPSS model estimates a 1.4% probability this vulnerability will be exploited in the wild within 30 days (71% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2026-54420?
We found 4 public GitHub repositories referencing CVE-2026-54420, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2026-54420?
CVE-2026-54420 is classified under CWE-61 (CWE-61 UNIX Symbolic Link (Symlink) Following).
Cross-checked against
Impactr finds and proves whether CVE-2026-54420 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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