CVE-2021-32706
HighPi-hole's Web interface provides a central location to manage a Pi-hole instance and review performance statistics.
Published Aug 4, 2021 · Updated Aug 27, 2026 · Also known as GHSA-5cm9-6p3m-v259
Key Facts
Patch immediately- CVE-2021-32706 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Pi-Hole, AdminLTE.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 60% probability of exploitation in the next 30 days.
- Fixed versions are available, including Pi-Hole 5.5.1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
60%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2021-32706 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Pi-hole's Web interface provides a central location to manage a Pi-hole instance and review performance statistics. Prior to Pi-hole Web interface version 5.5.1, the validDomainWildcard preg_match filter allows a malicious character through that can be used to execute code, list directories, and overwrite sensitive files. The issue lies in the fact that one of the periods is not escaped, allowing any character to be used in its place. A patch for this vulnerability was released in version 5.5.1.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Pi-HolePi-Hole | See advisory | 5.5.1 |
| AdminLTE | >= < 5.5.1 | n/a |
Patched Releases
Pi-Hole
5.5.1
Timeline
Publicly disclosed
Aug 4, 2021
Last updated
Aug 27, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
FAQ
Common Questions.
Pi-hole's Web interface provides a central location to manage a Pi-hole instance and review performance statistics.
Affected: Pi-Hole; AdminLTE versions >= < 5.5.1. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Pi-Hole 5.5.1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
Is CVE-2021-32706 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo