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Security: Potential Information Disclosure via phpinfo() Endpoint#1003

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tomaioo wants to merge 1 commit into
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tomaioo:fix/security/potential-information-disclosure-via-php
Closed

Security: Potential Information Disclosure via phpinfo() Endpoint#1003
tomaioo wants to merge 1 commit into
nextcloud:masterfrom
tomaioo:fix/security/potential-information-disclosure-via-php

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@tomaioo

@tomaioo tomaioo commented May 25, 2026

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Summary

Security: Potential Information Disclosure via phpinfo() Endpoint

Problem

Severity: Medium | File: lib/Controller/PageController.php:L47

The PageController exposes a phpinfo() endpoint that renders PHP configuration details when enabled via app config. While protected by a config flag, if enabled, phpinfo(INFO_ALL & ~INFO_ENVIRONMENT & ~INFO_VARIABLES) still exposes extensive server information including loaded extensions, compilation options, and server paths. This could aid attackers in reconnaissance. The PhpInfoResponse class sets ContentSecurityPolicy and FeaturePolicy but the raw phpinfo output still contains sensitive data.

Solution

Consider removing or heavily restricting this endpoint. If needed for debugging, require admin authentication and log access. Evaluate if the INFO_MODULES flag might still expose sensitive extension versions.

Changes

  • lib/Controller/PageController.php (modified)

The PageController exposes a phpinfo() endpoint that renders PHP configuration details when enabled via app config. While protected by a config flag, if enabled, phpinfo(INFO_ALL & ~INFO_ENVIRONMENT & ~INFO_VARIABLES) still exposes extensive server information including loaded extensions, compilation options, and server paths. This could aid attackers in reconnaissance. The PhpInfoResponse class sets ContentSecurityPolicy and FeaturePolicy but the raw phpinfo output still contains sensitive data.

Signed-off-by: tomaioo <203048277+tomaioo@users.noreply.github.com>
@kesselb

kesselb commented Jun 1, 2026

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Thanks for your pull request 👍

require admin authentication

The endpoint is only accessible to administrators already.
Controllers are by default admin-only.

@kesselb kesselb closed this Jun 1, 2026
@github-actions

github-actions Bot commented Jun 9, 2026

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2 participants