CVE-2026-54420
Confirmed PUBLISHEDLiteSpeed 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...
20 hours faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Jun 14, 2026
- Exploitation Reported
- Jun 14, 2026
- CVSS
- 8.5 High
- EPSS
- 1.3%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| LiteSpeed Technologies |
cPanel Plugin
WHM and cPanel PlugIn |
2.3 to < 2.4.8 |
Affected |
CVE References
- litespeedtech.com/products/litespeed-web-server/control-panel-... litespeedtech.com · CVE Record https://www.litespeedtech.com/products/litespeed-web-server/control-p...
- blog.litespeedtech.com/2026/06/01/security-update-for-litespeed-cpa... blog.litespeedtech.com · CVE Record https://blog.litespeedtech.com/2026/06/01/security-update-for-litespe...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-14 04:01 UTC |
| CISA | 2026-06-15 00:00 UTC |
| All CISA Advisories | 2026-06-15 20:20 UTC |
| Daily CyberSecurity | 2026-06-16 00:20 UTC |
| TheHackerNews | 2026-06-16 07:20 UTC |
| BleepingComputer | 2026-06-16 11:20 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-14 04:01:15 UTC · CVE
Proof of concept available
Recorded 2026-06-16 06:09:03 UTC · GitHub
Weaknesses (CWE)
-
UNIX Symbolic Link (Symlink) Following
Recent Mentions
BleepingComputer · Jun 16, 2026
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has given U.S. government agencies three days to secure their servers against an actively exploited vulnerability (CVE-2026-54420) in the LiteSpeed cPanel user-end plugin. [...]
TheHackerNews · Jun 16, 2026
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a security flaw impacting LiteSpeed cPanel Plugin to its Known Exploited Vulnerabilities (KEV) catalog, requiring Federal Civilian Executive Branch (FCEB) agencies to apply the fixes by June 18, 2026. The vulnerability in question is CVE-2026-54420 (CVSS score: 8.5), which has been described as a case of privilege
Daily CyberSecurity · Jun 16, 2026
A LiteSpeed cPanel privilege escalation flaw is being exploited in the wild right now. Tracked as CVE-2026-54420, the The post LiteSpeed cPanel Privilege Escalation Flaw Exploited in the Wild (CVE-2026-54420) appeared first on Daily CyberSecurity. Related posts: Critical CVE-2025-11749 Flaw in AI Engine Plugin Exposes WordPress Sites to Full Compromise Critical cPanel Flaw (CVSS 9.3) Allows Directory Traversal LPE for Full Server Takeover Under Attack: Cisco Urges Immediate Action as Hackers Actively Exploit SD-WAN Manager Flaws
All CISA Advisories · Jun 15, 2026
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-20262 Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability CVE-2026-54420 LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies, updating BOD 22-01. BOD 26-04 reinforces the importance of the KEV catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s Known Exploited Vulnerabilities (KEV) catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Aware of an exploited vulnerability not currently listed in the KEV catalog? Submit for potential addition: KEV Nomination Form. Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance.
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2026-06-18 15:18:55 UTC · 0 stars
A vulnerability in LiteSpeed cPanel Plugin before 2.4.8 and 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.
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
11:20 UTC about 1 month ago11:20 UTC · about 1 month ago
KEV confirmed by BleepingComputer
Exploitation attested by an external source
-
07:20 UTC about 1 month ago07:20 UTC · about 1 month ago
KEV confirmed by TheHackerNews
Exploitation attested by an external source
-
06:09 UTC about 1 month ago06:09 UTC · about 1 month ago
Public PoC available
Public proof-of-concept code published
-
00:20 UTC about 1 month ago00:20 UTC · about 1 month ago
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
20:20 UTC about 1 month ago20:20 UTC · about 1 month ago
KEV confirmed by All CISA Advisories
Exploitation attested by an external source
-
00:00 UTC about 1 month ago00:00 UTC · about 1 month ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
04:01 UTC about 1 month ago04:01 UTC · about 1 month ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
03:23 UTC about 1 month ago03:23 UTC · about 1 month ago
CVE published
Vulnerability disclosed publicly
-
03:23 UTC about 1 month ago03:23 UTC · about 1 month ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-54420
{
"cve_id": "CVE-2026-54420",
"title": "LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn ...",
"affected_vendor": "LiteSpeed Technologies",
"affected_product": "cPanel Plugin",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 8.5,
"epss_score": 0.01261,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}