# CVE-2026-54420: LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following

> Attackers with FTP or web shell access can exploit symlink mishandling to escalate privileges or read data on shared hosting servers.

- **Severity:** High 8.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 15 Jun 2026 (CISA KEV)
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jun 2026
- **Updated:** 16 Jun 2026
- **Also known as:** GHSA-3g44-c4qc-cxm8

## What is CVE-2026-54420?

CVE-2026-54420 is a high-severity path traversal vulnerability in LiteSpeed Technologies cPanel Plugin, published on 14 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-61 (UNIX Symbolic Link (Symlink) Following)

## Which versions are affected by CVE-2026-54420?

It affects 2 products.


Products: Litespeedtech Litespeed Cpanel Plugin, Litespeedtech Litespeed Whm Plugin.

## How do I fix CVE-2026-54420?

No fix has been published for CVE-2026-54420 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 18 Jun 2026.

## Is CVE-2026-54420 being exploited?

Yes. Attackers have exploited CVE-2026-54420 in the wild since at least 15 Jun 2026.

Public exploit code:

- https://github.com/mahfuzreham/litespeed-cpanel-cve-2026-54420-fix (github_poc): https://github.com/mahfuzreham/litespeed-cpanel-cve-2026-54420-fix
- CVE-2026-54420 (github_poc): https://github.com/HORKimhab/CVE-2026-54420
- https://github.com/Resellnom/litespeed-cpanel-cve-2026-54420-fix (github_poc): https://github.com/Resellnom/litespeed-cpanel-cve-2026-54420-fix
- PoC de CVE-2026-54420: explotacion via symlink en el plugin LiteSpeed de cPanel/WHM. (github_poc): https://github.com/fevar54/CVE-2026-54420-LiteSpeed-Symlink-Exploit

## Other vulnerabilities in LiteSpeed Technologies cPanel Plugin

- [CVE-2026-48172](https://insights.sbomify.com/CVE-2026-48172/): LiteSpeed cPanel Plugin Privilege Escalation (critical 10.0, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-54420 and fix it if it is affected.

What it is: CVE-2026-54420 is a high-severity path traversal vulnerability in LiteSpeed Technologies cPanel Plugin, published on 14 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2026-54420 in the wild since at least 15 Jun 2026.

Affected product: LiteSpeed Technologies cPanel Plugin. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-54420/ (Markdown: https://insights.sbomify.com/CVE-2026-54420/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-54420
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54420
- OSV: https://osv.dev/vulnerability/CVE-2026-54420

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-54420/
Summaries are generated and may contain mistakes; the official description above is the record.