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CVE-2025-53533VulnerabilityPublished

CVE-2025-53533: pi-hole web · Cross-site Scripting

Affects pi-hole webSource CVE Database V5

0

Not known to be exploited · public detection template (Nuclei) · CVSS 5.1 Medium : upgrade to 6.3 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.3
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 2025

  2. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Upgrade pi-hole/web to 6.3.

Affected software

ProductAffectedFixed in
GitHubpi-hole/webpkg:github/pi-hole/webOther threatsAffected
  • <6.3
Fixed in
  • 6.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

European organizations should immediately upgrade all Pi-hole Admin Interface installations to version 6.3 or later, where the vulnerability is patched. If immediate upgrading is not feasible, organizations should implement strict access controls to restrict access to the Pi-hole admin interface, such as VPN-only access or IP whitelisting, to reduce exposure to untrusted users. Web application firewalls (WAFs) can be configured to detect and block suspicious URL patterns that include script injection attempts in the path. Educate users and administrators about the risks of clicking unsolicited or suspicious links, especially those purporting to be related to network management tools. Regularly audit Pi-hole logs for unusual access patterns or error page requests that may indicate attempted exploitation. Additionally, consider deploying Content Security Policy (CSP) headers on the Pi-hole web interface to limit the impact of any potential XSS by restricting script execution sources. Finally, maintain an up-to-date inventory of Pi-hole deployments to ensure all instances are patched promptly.

Description

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level advertisement and internet tracker blocking application. Pi-hole Admin Interface versions 6.2.1 and earlier are vulnerable to reflected cross-site scripting (XSS) via a malformed URL path. The 404 error page includes the requested path in the class attribute of the body tag without proper sanitization or escaping. An attacker can craft a URL containing an onload attribute that will execute arbitrary JavaScript code in the browser when a victim visits the malicious link. If an attacker sends a crafted pi-hole link to a victim and the victim visits it, attacker-controlled JavaScript code is executed in the browser of the victim. This has been patched in version 6.3.

References

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