CVE-2021-27910: Stored XSS vulnerability on Bounce Management Callback

First published: Mon Aug 30 2021(Updated: )

### Impact Insufficient sanitization / filtering allows for arbitrary JavaScript Injection in Mautic using the bounce management callback function. The values submitted in the "error" and "error_related_to" parameters of the POST request of the bounce management callback will be permanently stored and executed once the details page of an affected lead is opened by a Mautic user. An attacker with access to the bounce management callback function (identified with the Mailjet webhook, but it is assumed this will work uniformly across all kinds of webhooks) can inject arbitrary JavaScript Code into the "error" and "error_related_to" parameters of the POST request (POST /mailer/<product / webhook>/callback). It is noted that there is no authentication needed to access this function. The JavaScript Code is stored permanently in the web application and executed every time an authenticated user views the details page of a single contact / lead in Mautic. This means, arbitrary code can be executed to, e.g., steal or tamper with information. ### Patches Upgrade to 3.3.4 or 4.0.0 ### Workarounds No ### References https://github.com/mautic/mautic/releases/tag/3.3.4 https://github.com/mautic/mautic/releases/tag/4.0.0 ### For more information If you have any questions or comments about this advisory: * Email us at [security@mautic.org](mailto:security@mautic.org)

Credit: security@mautic.org security@mautic.org

Affected Software	Affected Version	How to fix
composer/mautic/core	<4.0.0>=3.3.0<3.3.4>=3.2.0<3.3.0>=3.1.0<3.2.0>=3.0.0<3.1.0
Acquia Mautic	<3.3.4
Acquia Mautic	=4.0.0-alpha1
Acquia Mautic	=4.0.0-beta
Acquia Mautic	=4.0.0-rc
composer/mautic/core	>=4.0.0-alpha1<4.0.0	4.0.0
composer/mautic/core	<3.3.4	3.3.4

Remedy

https://github.com/mautic/mautic/security/advisories/GHSA-86pv-95mj-7w5f

Never miss a vulnerability like this again

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.