CVE-2025-5257 is a medium-severity security vulnerability in mautic/core (composer), affecting versions >= 4.0.0, < 4.4.16. It is fixed in 4.4.16, 5.2.6, 6.0.2.
Summary This advisory addresses a security vulnerability in Mautic where unpublished page previews could be accessed by unauthenticated users and potentially indexed by search engines.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 Unauthorized Access to Unpublished Page Previews: The page preview functionality for unpublished content, accessible via predictable URLs (e.g., /page/preview/1, /page/preview/2), lacked proper authorization checks.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.
CVE-2025-5257 has a CVSS score of 6.5 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (4.4.16, 5.2.6, 6.0.2). Upgrading removes the vulnerable code path.
composer
mautic/core (>= 4.0.0, < 4.4.16)mautic/core (>= 5.0.0-alpha, < 5.2.6)mautic/core (>= 6.0.0-alpha, < 6.0.2)mautic/core → 4.4.16 (composer)mautic/core → 5.2.6 (composer)mautic/core → 6.0.2 (composer)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2025-5257 is reachable in your applications. Explore open-source security for your team.
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Already deployed Kodem? See CVE-2025-5257 in your environment →Upgrade the following packages to resolve this vulnerability:
mautic/core to 4.4.16 or latermautic/core to 5.2.6 or latermautic/core to 6.0.2 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2025-5257 is a medium-severity security vulnerability in mautic/core (composer), affecting versions >= 4.0.0, < 4.4.16. It is fixed in 4.4.16, 5.2.6, 6.0.2.
CVE-2025-5257 has a CVSS score of 6.5 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
mautic/core (composer) versions >= 4.0.0, < 4.4.16 is affected.
Yes. CVE-2025-5257 is fixed in 4.4.16, 5.2.6, 6.0.2. Upgrade to this version or later.
Whether CVE-2025-5257 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
mautic/core to 4.4.16 or latermautic/core to 5.2.6 or latermautic/core to 6.0.2 or later