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contao/core-bundle vulnerabilities

Vulnerabilities published for contao/core-bundle in the last 30 days: 6. Listed in the KEV catalogue: 0.

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Vulnerabilities: 40

  1. CVE-2026-107851

    Medium · CVSS 4.3EPSS 0.19%Fix available

    Contao: Improper access control in the table access voter

    Contao is an Open Source CMS. From version 5.7.0 until 5.7.12, TableAccessVoter::hasAccessToModule() in core-bundle/src/Security/Voter/DataContainer/TableAccessVoter.php caches authorization decisions using only $tokenHash, a hash of the user's security token, and omits the table returned by getDataSource(). If one request first checks a table allowed to the user and then a different denied table, the voter can reuse the allowed result, while DefaultDataContainerVoter can convert an incorrect abstention into a grant. A low-privileged backend user can consequently read, create, update, or delete records in tables outside assigned module permis

    contao/core-bundlePHP
    • Update to 5.7.12
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  2. CVE-2026-107850

    Medium · CVSS 4.3EPSS 0.19%Fix available

    Contao: Improper access control in the preview links module

    Contao is an Open Source CMS. From version 5.7.1 until 5.7.12, core-bundle/config/services.yaml registers the preview access voter as Contao\CoreBundle\Security\Voter\DataContainer\PreviewAccessVoter although the shipped class is PreviewVoter. Symfony therefore omits voter autoconfiguration and removes the private service, so PreviewVoter::hasAccess() never enforces ownership. A non-admin backend user with the preview_link module can list every tl_preview_link record, obtain signed share URLs created by other users, and use them to view unpublished pages with showUnpublished despite lacking page permission. The advisory does not establish edi

    contao/core-bundlePHP
    • Update to 5.7.12
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  3. CVE-2026-107848

    Low · CVSS 3.5EPSS 0.11%Fix available

    Contao: Cross-site request forgery in custom backend actions

    Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, RequestTokenListener validates REQUEST_TOKEN only for POST requests, while the declarative GET guard runs only when an act parameter is present. Backend actions dispatched through the key parameter can therefore execute without a CSRF token when an authenticated backend user loads an attacker-controlled URL. Reachable actions remain limited to modules available to that user, and the advisory demonstrates destructive or state-changing actions rather than privilege escalation. This issue is fixed in versions 5.3.50 and 5.7.12.

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.50
    • Update to 5.7.12
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  4. CVE-2026-107844

    Medium · CVSS 5.3EPSS 0.31%Fix available

    Contao: Path traversal in the images controller

    Contao is an Open Source CMS. From version 5.0.0 until 5.3.50 and 5.7.12, ImagesController joins the user-controlled {path} parameter to the configured image target directory with Path::join() but does not use Path::isBasePath() to verify that the canonical path remains inside that directory. An unauthenticated request containing encoded parent-directory segments can therefore return files under the project directory through BinaryFileResponse when their names use an extension allowed by contao.image.valid_extensions. The route can also reveal whether arbitrary paths exist, and debug responses can disclose absolute filesystem paths, but paths

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.50
    • Update to 5.7.12
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  5. CVE-2026-107843

    Medium · CVSS 5.3EPSS 0.26%Fix available

    Contao: The registration module re-sends activation mails on any unauthenticated POST, with no throttle and no captcha check

    Contao is an Open Source CMS. From version 4.1.0 until 5.3.50 and 5.7.12, ModuleRegistration::compile() enters its follow-up registration branch on any POST to a page containing the registration module without verifying FORM_SUBMIT or the preceding captcha result. resendActivationMail() can then invoke OptInToken::send() without rate limiting, allowing an unauthenticated attacker to cause repeated activation emails to be sent to an address with a pending registration and to determine whether that pending registration exists. The branch is reachable only when reg_activate is enabled and the target has an unconfirmed registration and opt-in tok

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.50
    • Update to 5.7.12
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  6. CVE-2026-107842

    Medium · CVSS 5.3EPSS 0.26%Fix available

    Contao: Protected page content is disclosed to anonymous visitors after contao.search.index_protected is disabled

    Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, ModuleSearch can disclose protected page titles, URLs, and indexed context snippets to unauthenticated visitors when contao.search.index_protected is changed from enabled to disabled. Authorization metadata is stored per row in tl_search, but disabling the setting removes the protected-row filter without deleting rows indexed while protection was enabled. The protected pages continue to return an authorization response, so this issue exposes search metadata and indexed text rather than bypassing page access. This issue is fixed in versions 5.3.50 and 5.7.12.

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.50
    • Update to 5.7.12
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  7. CVE-2026-55825

    Low · CVSS 3.1EPSS 0.3%Fix available

    Contao: Possible path traversal in job download URIs

    Contao is an Open Source CMS. In versions 5.7.0 through 5.7.6, an authenticated backend user who can access one job can request an attachment identifier containing ../ segments and make the job attachment download endpoint read a file from another job directory inside var/job-attachments. The controller authorizes only the jobUuid route parameter. The later attachment lookup joins that authorized job UUID with the attacker-controlled identifier, then passes the combined path to the virtual filesystem. VirtualFilesystem::resolve() canonicalizes the whole path and only rejects paths that escape the filesystem mount, so authorized-job/../victim-

    contao/core-bundlePHP
    • Update to 5.7.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

  8. CVE-2026-55824

    Low · CVSS 2.6EPSS 0.24%Fix available

    Contao crawler leaks auth credentials to external hosts

    Contao is an Open Source CMS. In versions 4.13.40 through 5.3.46 and 5.7.0-RC1 through 5.7.6, the crawler leaks auth credentials to external hosts. Contao's crawler tries to prevent confidential HTTP client options from being sent to external domains by creating a scoped client: full options for root page origins, cleaned options for everything else. The cleaner removes Cookie and Authorization headers, but it removes the non-Symfony option names basic_auth and bearer_auth instead of Symfony HttpClient's real auth_basic and auth_bearer options. When contao.crawl.default_http_client_options contains Basic or Bearer authentication for a protect

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.47
    • Update to 5.7.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

  9. CVE-2026-57232

    Low · CVSS 3.1EPSS 0.29%Fix available

    Contao: Server-Side Request Forgery (SSRF) via Unvalidated RSS Feed URL in Feed Reader Module

    Contao is an Open Source CMS. From 5.3.35 through 5.3.47 and from 5.7.0-RC1 through 5.7.8, the Feed Reader front-end module passes configured RSS feed URLs from FeedReaderController::getResponse() to feedIo->read() without scheme or private-address validation, allowing a backend user with module-edit permissions to make the server request internal network services, loopback addresses, or cloud metadata endpoints. In core-bundle/src/Controller/FrontendModule/FeedReaderController.php, the getResponse() function iterates over the configured feed URLs and passes each one directly to the HTTP client (via $this->feedIo->read($url, new Feed())) with

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.48
    • Update to 5.7.9
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  10. CVE-2025-65961

    Low · CVSS 3.3EPSS 0.17%Fix available

    Contao is vulnerable to cross-site scripting in templates

    Contao is an Open Source CMS. From version 4.0.0 to before 4.13.57, before 5.3.42, and before 5.6.5, it is possible to inject code into the template output that will be executed in the browser in the front end and back end. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves not using the affected templates or patch them manually.

    contao/core-bundle contao/core-bundle contao/core-bundlePHP
    • Update to 4.13.57
    • Update to 5.3.42
    • Update to 5.6.5
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  11. CVE-2025-65960

    Medium · CVSS 6.6EPSS 0.18%Fix available

    Contao is vulnerable to remote code execution in template closures

    Contao is an Open Source CMS. From version 4.0.0 to before 4.13.57, before 5.3.42, and before 5.6.5, back end users with precise control over the contents of template closures can execute arbitrary PHP functions that do not have required parameters. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves manually patching the Contao\Template::once() method.

    contao/core-bundle contao/core-bundle contao/core-bundlePHP
    • Update to 4.13.57
    • Update to 5.3.42
    • Update to 5.6.5
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  12. CVE-2025-57759

    Medium · CVSS 4.3EPSS 0.25%Fix available

    Contao has improper privilege management for page and article fields

    Contao is an Open Source CMS. In versions starting from 5.3.0 and prior to 5.3.38 and 5.6.1, under certain conditions, back end users may be able to edit fields of pages and articles without having the necessary permissions. This issue has been patched in versions 5.3.38 and 5.6.1. There are no workarounds.

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.38
    • Update to 5.6.1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  13. CVE-2025-57758

    Medium · CVSS 4.3EPSS 0.25%Fix available

    Contao has improper access control in the back end voters

    Contao is an Open Source CMS. In versions starting from 5.0.0 and prior to 5.3.38 and 5.6.1, the table access voter in the back end doesn't check if a user is allowed to access the corresponding module. This issue has been patched in versions 5.3.38 and 5.6.1. A workaround involves not relying solely on the voter and additionally to check USER_CAN_ACCESS_MODULE.

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.38
    • Update to 5.6.1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  14. CVE-2025-57757

    Medium · CVSS 5.3EPSS 0.3%Fix available

    Contao discloses information in the news module

    Contao is an Open Source CMS. In versions starting from 5.0.0 and prior to 5.3.38 and 5.6.1, if a news feed contains protected news archives, their news items are not filtered and become publicly available in the RSS feed. This issue has been patched in versions 5.3.38 and 5.6.1. A workaround involves not adding protected news archives to the news feed page.

    contao/core-bundle contao/core-bundlePHP
    • Update to 5.3.38
    • Update to 5.6.1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  15. CVE-2025-57756

    Medium · CVSS 5.3EPSS 0.29%Fix available

    Contao discloses sensitive information in the front end search index

    Contao is an Open Source CMS. In versions starting from 4.9.14 and prior to 4.13.56, 5.3.38, and 5.6.1, protected content elements that are rendered as fragments are indexed and become publicly available in the front end search. This issue has been patched in versions 4.13.56, 5.3.38, and 5.6.1. A workaround involves disabling the front end search.

    contao/core-bundle contao/core-bundle contao/core-bundlePHP
    • Update to 4.13.56
    • Update to 5.3.38
    • Update to 5.6.1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  16. CVE-2025-29790

    Medium · CVSS 4.8EPSS 0.22%Fix available

    Contao allows cross-site scripting through SVG uploads

    Contao is an Open Source CMS. Users can upload SVG files with malicious code, which is then executed in the back end and/or front end. This vulnerability is fixed in Contao 4.13.54, 5.3.30, or 5.5.6.

    contao/core-bundle contao/core-bundle contao/core-bundlePHP
    • Update to 4.13.54
    • Update to 5.3.30
    • Update to 5.5.6
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  17. CVE-2024-45604

    Medium · CVSS 4.3EPSS 0.43%Fix available

    Directory traversal in the file selector widget in contao/core-bundle

    Contao is an Open Source CMS. In affected versions authenticated users in the back end can list files outside the document root in the file selector widget. Users are advised to update to Contao 4.13.49. There are no known workarounds for this vulnerability.

    contao/core-bundlePHP
    • Update to 4.13.49
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  18. CVE-2024-45398

    High · CVSS 8.3EPSS 0.53%Fix available

    Remote command execution through file upload in contao/core-bundle

    Contao is an Open Source CMS. In affected versions a back end user with access to the file manager can upload malicious files and execute them on the server. Users are advised to update to Contao 4.13.49, 5.3.15 or 5.4.3. Users unable to update are advised to configure their web server so it does not execute PHP files and other scripts in the Contao file upload directory.

    contao/core-bundle contao/core-bundle contao/core-bundlePHP
    • Update to 4.13.49
    • Update to 5.3.15
    • Update to 5.4.3
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  19. CVE-2024-45612

    Medium · CVSS 5.3EPSS 0.3%Fix available

    Insert tag injection via canonical URL in Contao

    Contao is an Open Source CMS. In affected versions an untrusted user can inject insert tags into the canonical tag, which are then replaced on the web page (front end). Users are advised to update to Contao 4.13.49, 5.3.15 or 5.4.3. Users unable to upgrade should disable canonical tags in the root page settings.

    contao/core-bundle contao/core-bundle contao/core-bundlePHP
    • Update to 4.13.49
    • Update to 5.3.15
    • Update to 5.4.3
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  20. CVE-2024-30262

    Medium · CVSS 5.9EPSS 0.5%Fix available

    Contao's remember-me tokens will not be cleared after a password change

    Contao is an open source content management system. Prior to version 4.13.40, when a frontend member changes their password in the personal data or the password lost module, the corresponding remember-me tokens are not removed. If someone compromises an account and is able to get a remember-me token, changing the password would not be enough to reclaim control over the account. Version 4.13.40 contains a fix for the issue. As a workaround, disable "Allow auto login" in the login module.

    contao/core-bundlePHP
    • Update to 4.13.40
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

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