CVE-2026-54420LiteSpeed 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 Clo…
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It affects LiteSpeed Technologies cPanel Plugin and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jun 15, 2026; federal agencies had to remediate by Jun 18, 2026. Treat that date as your deadline.
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Free account, 1 product
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
- 8.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-61
- Known exploited
- Added to CISA KEV Jun 15, 2026; federal remediation due Jun 18, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 0.81% (percentile 56)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Jun 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
LiteSpeed Technologies cPanel Plugin litespeed_technologies:cpanel_plugin (from the name) | from 2.3 before 2.4.8 | CNA record |
litespeedtech litespeed_cpanel_plugin litespeedtech:litespeed_cpanel_plugin | before 2.4.8 | NVD |
litespeedtech litespeed_whm_plugin litespeedtech:litespeed_whm_plugin | before 5.3.2.0 | NVD |
References
- https://www.litespeedtech.com/products/litespeed-web-server/control-panel-support/cpanelproduct
- https://blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpanel-plugin-2/vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-54420us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.