CVE-2025-53533Public exploitNetwork attack vector

Reflected XSS via unescaped 404 path

Published Oct 27, 2025 · Updated Oct 27, 2025

Reflected XSS in Pi-hole Web Interface before 6.3 allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. The 404 handler inserts the requested path into the body tag class attribute without sanitizing or escaping it, permitting an injected onload handler. Exploitation requires a victim to follow the malicious link, after which attacker-controlled script runs in that victim's browser context.

CVSS severity5.1
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Pi-hole Web Interface before 6.3 allows remote attackers to execute JavaScript in a victim's browser via a crafted URL. The 404 handler inserts the requested path into the body tag class attribute without sanitizing or escaping it, permitting an injected onload handler. Exploitation requires a victim to follow the malicious link, after which attacker-controlled script runs in that victim's browser context.

The record

CVE
CVE-2025-53533
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
Pi-hole
Product
Pi-hole Web Interface
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pi-hole · Pi-hole Web Interfaceversion=< 6.3

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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