CVE-2021-32793

Stored XSS Vulnerability in the Pi-hole Webinterface

MEDIUM
4.8
CVSS Score
Published: August 4, 2021 at 05:55 PM UTC
Updated: June 17, 2026 at 03:53 AM UTC
2 products affected across 1 vendorPi HoleAdminLTE

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.8%

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 function to add domains to blocklists or allowlists is vulnerable to a stored cross-site-scripting vulnerability. User input added as a wildcard domain to a blocklist or allowlist is unfiltered in the web interface. Since the payload is stored permanently as a wildcard domain, this is a persistent XSS vulnerability. A remote attacker can therefore attack administrative user accounts through client-side attacks. Pi-hole Web Interface version 5.5.1 contains a patch for this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.5.1
Affected range stops below 5.5.1, so it looks safe — our inference, not a vendor statement
v < 5.5.1
Affected range stops below 5.5.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCRelease NotesThird Party Advisory
https://github.com/pi-hole/AdminLTE/releases/tag/v5.5.1

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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