Mautic's Predictable Page Indexing Might Lead to Sensitive Data Exposure

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

EPSS

• CVE-2025-5257: 0.36% estimated exploitation activity in the next 30 days; percentile 30.36 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary This advisory addresses a security vulnerability in Mautic where unpublished page previews could be accessed by unauthenticated users and potentially indexed by search engines. This could lead to the unintended disclosure of draft content or sensitive information. Unauthorized Access to Unpublished Page Previews: The page preview functionality for unpublished content, accessible via predictable URLs (e.g., /page/preview/1, /page/preview/2), lacked proper authorization checks. This allowed any unauthenticated user to view content that was not yet intended for public release, and allowed search engines to index these private preview URLs, making the content publicly discoverable. Mitigation Mautic has patched this vulnerability by enforcing proper permission checks on preview pages. Users should upgrade to the patched version of Mautic or later.

Published by the source

28 May 2025, 17:38 UTC

Last modified by the source

28 May 2025, 20:08 UTC

Source last checked

26 Oct 2026, 14:33 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-cqx4-9vqf-q3m8

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# Patch Next advisory brief: CVE-2025-5257

Advisory: Mautic's Predictable Page Indexing Might Lead to Sensitive Data Exposure
IDs: CVE-2025-5257, GHSA-cqx4-9vqf-q3m8
Record: https://patchnext.com/advisories/cve-2025-5257 (revision 1, source checked 26 Oct 2026, 14:33 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: mautic/core 6.0.2, 5.2.6, 4.4.16. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist mautic/core: affected >= 4.0.0, < 4.4.16; >= 5.0.0-alpha, < 5.2.6; >= 6.0.0-alpha, < 6.0.2; fixed in 5.2.6, 4.4.16, 6.0.2

## Suggested inspection (read-only)
- Packagist mautic/core: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on mautic/core.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-cqx4-9vqf-q3m8 (GitHub-reviewed advisory GHSA-cqx4-9vqf-q3m8 lists affected ranges: Packagist mautic/core >=4.0.0 =5.0.0-alpha =6.0.0-alpha <6.0.2)

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