pi-hole web up to 6.4 queries.js formatInfo cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in pi-hole web up to 6.4. This affects the function formatInfo of the file queries.js. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-33405. The attack must be initiated from a local position. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in pi-hole web up to 6.4. This affects the function formatInfo of the file queries.js. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, the formatInfo() function in queries.js renders data.upstream, data.client.ip, and data.ede.text into HTML without escaping when a user expands a query row in the Query Log, enabling stored HTML injection. JavaScript execution is blocked by the server's CSP (script-src 'self'). The same fields are properly escaped in the table view (rowCallback), confirming the omission was an oversight. This vulnerability is fixed in 6.5.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-33405 since 03/19/2026. The exploitability is told to be easy. Attacking locally is a requirement. Additional levels of successful authentication are needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 6.5 eliminates this vulnerability.

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Productinfo

Vendor

• pi-hole

Name

• web

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4

Website

• Product: https://github.com/pi-hole/web/

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