CVE-2025-57756: Contao/core bundle Contao Discloses Sensitive Information Vulnerability
MODERATECVE-2025-57756 is a MODERATE (CVSS 5.3) contao discloses sensitive information vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Contao/core bundle libraries in the Packagist ecosystem. The issue involves contao discloses sensitive information in the front end search index. Remediation is available by upgrading affected packages to version 4.13.56, 5.3.38, 5.6.1.
CVE-2025-57756 at a Glance
Security Impact
CVSS: 5.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
How to Fix CVE-2025-57756
To remediate this vulnerability, upgrade all affected Contao/core bundle dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade contao/core-bundle to 4.13.56Upgrade contao/contao to 4.13.56Upgrade contao/core-bundle to 5.3.38Upgrade contao/core-bundle to 5.6.1Upgrade contao/contao to 5.3.38Upgrade contao/contao to 5.6.1Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for contao/core-bundleHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-57756, inspect your project dependencies for Contao/core bundle:
inspect dependencies for contao/core-bundleAnalyze the terminal output to locate any version of Contao/core bundle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.13.56), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In Contao/core bundle, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-57756 Affected Contao/core bundle Versions
6 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
contao/core-bundle
|
Packagist |
≥ 4.9.14
< 4.13.56
|
4.13.56
|
|
contao/contao
|
Packagist |
≥ 4.9.14
< 4.13.56
|
4.13.56
|
|
contao/core-bundle
|
Packagist |
≥ 5.0.0-RC1
< 5.3.38
|
5.3.38
|
|
contao/core-bundle
|
Packagist |
≥ 5.4.0-RC1
< 5.6.1
|
5.6.1
|
|
contao/contao
|
Packagist |
≥ 5.0.0-RC1
< 5.3.38
|
5.3.38
|
|
contao/contao
|
Packagist |
≥ 5.4.0-RC1
< 5.6.1
|
5.6.1
|
References
Frequently Asked Questions
What is CVE-2025-57756?
Which Contao/core bundle versions are affected?
What version fixes CVE-2025-57756?
Is contao/core-bundle affected?
Is contao/contao affected?
What is the CVSS score of CVE-2025-57756?
What CWE is associated with CVE-2025-57756?
How can I check Packagist dependencies for CVE-2025-57756?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-2xmj-8wmq-7475",
"modified" : "2025-08-28T18:51:33Z",
"published" : "2025-08-28T14:57:45Z",
"aliases" : [ "CVE-2025-57756" ],
"summary" : "Contao discloses sensitive information in the front end search index",
"details" : "### Impact\n\nProtected content elements that are rendered as fragments are indexed and become publicly available in the front end search.\n\n### Patches\n\nUpdate to Contao 4.13.56, 5.3.38 or 5.6.1.\n\n### Workarounds\n\nDisable the front end search.\n\n### For more information\n\nIf you have any questions or comments about this advisory, open an issue in [contao/contao](https://github.com/contao/contao/issues/new/choose).",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "contao/core-bundle"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "4.9.14"
}, {
"fixed" : "4.13.56"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "contao/contao"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "4.9.14"
}, {
"fixed" : "4.13.56"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "contao/core-bundle"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.0.0-RC1"
}, {
"fixed" : "5.3.38"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "contao/core-bundle"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.4.0-RC1"
}, {
"fixed" : "5.6.1"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "contao/contao"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.0.0-RC1"
}, {
"fixed" : "5.3.38"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Packagist",
"name" : "contao/contao"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.4.0-RC1"
}, {
"fixed" : "5.6.1"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/contao/contao/security/advisories/GHSA-2xmj-8wmq-7475"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-57756"
}, {
"type" : "WEB",
"url" : "https://github.com/contao/contao/commit/a03976c459b6f3985a28f6488b82a76ffb6c0514"
}, {
"type" : "WEB",
"url" : "https://contao.org/en/security-advisories/information-disclosure-in-the-front-end-search-index"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/contao/contao"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-200", "CWE-612" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-08-28T14:57:45Z",
"nvd_published_at" : "2025-08-28T17:15:36Z"
}
}